274531640 has 64 divisors (see below), whose sum is σ = 656164800. Its totient is φ = 103016448.

The previous prime is 274531639. The next prime is 274531643. The reversal of 274531640 is 46135472.

It is a super-2 number, since 2×274531640² = 150735242722179200, which contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 274531597 and 274531606.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (274531643) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 330746 + ... + 331574.

It is an arithmetic number, because the mean of its divisors is an integer number (10252575).

Almost surely, 2^274531640 is an apocalyptic number.

274531640 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 274531640, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (328082400).

274531640 is an abundant number, since it is smaller than the sum of its proper divisors (381633160).

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

274531640 is a wasteful number, since it uses less digits than its factorization.

274531640 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1344 (or 1340 counting only the distinct ones).

The product of its (nonzero) digits is 20160, while the sum is 32.

The square root of 274531640 is about 16568.9963486024. The cubic root of 274531640 is about 649.9263348470.

The spelling of 274531640 in words is "two hundred seventy-four million, five hundred thirty-one thousand, six hundred forty".