74117638 has 64 divisors (see below), whose sum is σ = 139594752. Its totient is φ = 28828800.

The previous prime is 74117633. The next prime is 74117639. The reversal of 74117638 is 83671147.

It is a junction number, because it is equal to n+sod(n) for n = 74117597 and 74117606.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (74117633) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 733788 + ... + 733888.

It is an arithmetic number, because the mean of its divisors is an integer number (2181168).

Almost surely, 2^74117638 is an apocalyptic number.

74117638 is a deficient number, since it is larger than the sum of its proper divisors (65477114).

74117638 is a wasteful number, since it uses less digits than its factorization.

74117638 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 229.

The product of its digits is 28224, while the sum is 37.

The square root of 74117638 is about 8609.1601216379. The cubic root of 74117638 is about 420.0559978246.

The spelling of 74117638 in words is "seventy-four million, one hundred seventeen thousand, six hundred thirty-eight".