74639892 has 12 divisors (see below), whose sum is σ = 174159776. Its totient is φ = 24879960.

The previous prime is 74639891. The next prime is 74639893. The reversal of 74639892 is 29893647.

It is an interprime number because it is at equal distance from previous prime (74639891) and next prime (74639893).

It is a tau number, because it is divible by the number of its divisors (12).

It is a super-2 number, since 2×74639892² = 11142226955543328, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (74639891) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 3109984 + ... + 3110007.

Almost surely, 2^74639892 is an apocalyptic number.

It is an amenable number.

74639892 is an abundant number, since it is smaller than the sum of its proper divisors (99519884).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

74639892 is a wasteful number, since it uses less digits than its factorization.

74639892 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6219998 (or 6219996 counting only the distinct ones).

The product of its digits is 653184, while the sum is 48.

The square root of 74639892 is about 8639.4381761779. The cubic root of 74639892 is about 421.0403009624.

The spelling of 74639892 in words is "seventy-four million, six hundred thirty-nine thousand, eight hundred ninety-two".