74940640 has 96 divisors (see below), whose sum is σ = 189423360. Its totient is φ = 27955200.

The previous prime is 74940631. The next prime is 74940643. The reversal of 74940640 is 4604947.

It is a junction number, because it is equal to n+sod(n) for n = 74940596 and 74940605.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (74940643) 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, 143580 + ... + 144100.

It is an arithmetic number, because the mean of its divisors is an integer number (1973160).

Almost surely, 2^74940640 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 74940640, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (94711680).

74940640 is an abundant number, since it is smaller than the sum of its proper divisors (114482720).

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

74940640 is a wasteful number, since it uses less digits than its factorization.

74940640 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 596 (or 588 counting only the distinct ones).

The product of its (nonzero) digits is 24192, while the sum is 34.

The square root of 74940640 is about 8656.8262082590. The cubic root of 74940640 is about 421.6050451456.

The spelling of 74940640 in words is "seventy-four million, nine hundred forty thousand, six hundred forty".