74564638 has 8 divisors (see below), whose sum is σ = 112559832. Its totient is φ = 37044696.

The previous prime is 74564617. The next prime is 74564671. The reversal of 74564638 is 83646547.

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

It is a junction number, because it is equal to n+sod(n) for n = 74564594 and 74564603.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 118420 + ... + 119047.

It is an arithmetic number, because the mean of its divisors is an integer number (14069979).

Almost surely, 2^74564638 is an apocalyptic number.

74564638 is a deficient number, since it is larger than the sum of its proper divisors (37995194).

74564638 is a wasteful number, since it uses less digits than its factorization.

74564638 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 237626.

The product of its digits is 483840, while the sum is 43.

The square root of 74564638 is about 8635.0818177942. The cubic root of 74564638 is about 420.8987518949.

The spelling of 74564638 in words is "seventy-four million, five hundred sixty-four thousand, six hundred thirty-eight".