• 740 can be written using four 4's:

740 has 12 divisors (see below), whose sum is σ = 1596. Its totient is φ = 288.

The previous prime is 739. The next prime is 743. The reversal of 740 is 47.

740 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

740 is an esthetic number in base 4, base 6, base 9 and base 15, because in such bases its adjacent digits differ by 1.

It can be written as a sum of positive squares in 2 ways, for example, as 484 + 256 = 22^2 + 16^2 .

740 is an undulating number in base 6.

It is a plaindrome in base 8, base 13, base 14 and base 15.

It is a nialpdrome in base 10.

It is not an unprimeable number, because it can be changed into a prime (743) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (5) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 2 + ... + 38.

It is an arithmetic number, because the mean of its divisors is an integer number (133).

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 740, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (798).

740 is an abundant number, since it is smaller than the sum of its proper divisors (856).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

740 is a wasteful number, since it uses less digits than its factorization.

740 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 46 (or 44 counting only the distinct ones).

The product of its (nonzero) digits is 28, while the sum is 11.

The square root of 740 is about 27.2029410175. The cubic root of 740 is about 9.0450416965.

Subtracting from 740 its sum of digits (11), we obtain a 6-th power (729 = 3^{6}).

Adding to 740 its reverse (47), we get a palindrome (787).

The spelling of 740 in words is "seven hundred forty", and thus it is an aban number and an iban number.

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