74731872 has 72 divisors (see below), whose sum is σ = 200320344. Its totient is φ = 24392704.

The previous prime is 74731871. The next prime is 74731873. The reversal of 74731872 is 27813747.

It is an interprime number because it is at equal distance from previous prime (74731871) and next prime (74731873).

It is a self number, because there is not a number n which added to its sum of digits gives 74731872.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (74731871) 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, 661288 + ... + 661400.

It is an arithmetic number, because the mean of its divisors is an integer number (2782227).

Almost surely, 2^74731872 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 74731872, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (100160172).

74731872 is an abundant number, since it is smaller than the sum of its proper divisors (125588472).

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

74731872 is a wasteful number, since it uses less digits than its factorization.

74731872 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 292 (or 201 counting only the distinct ones).

The product of its digits is 65856, while the sum is 39.

The square root of 74731872 is about 8644.7598000176. The cubic root of 74731872 is about 421.2131816594.

The spelling of 74731872 in words is "seventy-four million, seven hundred thirty-one thousand, eight hundred seventy-two".