74438657 has 8 divisors (see below), whose sum is σ = 78715392. Its totient is φ = 70279200.

The previous prime is 74438641. The next prime is 74438669. The reversal of 74438657 is 75683447.

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

It is a cyclic number.

It is not a de Polignac number, because 74438657 - 2⁴ = 74438641 is a prime.

It is a super-2 number, since 2×74438657² = 11082227311927298, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (74438627) 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, 28013 + ... + 30554.

It is an arithmetic number, because the mean of its divisors is an integer number (9839424).

Almost surely, 2^74438657 is an apocalyptic number.

It is an amenable number.

74438657 is a deficient number, since it is larger than the sum of its proper divisors (4276735).

74438657 is a wasteful number, since it uses less digits than its factorization.

74438657 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 58639.

The product of its digits is 564480, while the sum is 44.

The square root of 74438657 is about 8627.7840144501. The cubic root of 74438657 is about 420.6615745136.

The spelling of 74438657 in words is "seventy-four million, four hundred thirty-eight thousand, six hundred fifty-seven".