74385639 has 12 divisors (see below), whose sum is σ = 107562000. Its totient is φ = 49536864.

The previous prime is 74385629. The next prime is 74385671. The reversal of 74385639 is 93658347.

74385639 is a `hidden beast` number, since 7 + 4 + 3 + 8 + 5 + 639 = 666.

It is not a de Polignac number, because 74385639 - 2¹¹ = 74383591 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 74385594 and 74385603.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (74385629) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 5502 + ... + 13380.

It is an arithmetic number, because the mean of its divisors is an integer number (8963500).

Almost surely, 2^74385639 is an apocalyptic number.

74385639 is a deficient number, since it is larger than the sum of its proper divisors (33176361).

74385639 is a wasteful number, since it uses less digits than its factorization.

74385639 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 8934 (or 8931 counting only the distinct ones).

The product of its digits is 544320, while the sum is 45.

The square root of 74385639 is about 8624.7109516783. The cubic root of 74385639 is about 420.5616804833.

The spelling of 74385639 in words is "seventy-four million, three hundred eighty-five thousand, six hundred thirty-nine".