74640057 has 8 divisors (see below), whose sum is σ = 99580320. Its totient is φ = 49729920.

The previous prime is 74640053. The next prime is 74640061. The reversal of 74640057 is 75004647.

It is an interprime number because it is at equal distance from previous prime (74640053) and next prime (74640061).

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 74640057 - 2² = 74640053 is a prime.

It is a super-2 number, since 2×74640057² = 11142276217926498, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (74640053) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 919 + ... + 12252.

It is an arithmetic number, because the mean of its divisors is an integer number (12447540).

Almost surely, 2^74640057 is an apocalyptic number.

It is an amenable number.

74640057 is a deficient number, since it is larger than the sum of its proper divisors (24940263).

74640057 is a wasteful number, since it uses less digits than its factorization.

74640057 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 15063.

The product of its (nonzero) digits is 23520, while the sum is 33.

The square root of 74640057 is about 8639.4477254047. The cubic root of 74640057 is about 421.0406112147.

The spelling of 74640057 in words is "seventy-four million, six hundred forty thousand, fifty-seven".