71804864 has 28 divisors (see below), whose sum is σ = 146343624. Its totient is φ = 34930944.

The previous prime is 71804849. The next prime is 71804893. The reversal of 71804864 is 46840817.

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, 12794 + ... + 17529.

It is an arithmetic number, because the mean of its divisors is an integer number (5226558).

Almost surely, 2^71804864 is an apocalyptic number.

71804864 is a gapful number since it is divisible by the number (74) formed by its first and last digit.

It is an amenable number.

71804864 is an abundant number, since it is smaller than the sum of its proper divisors (74538760).

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

71804864 is a wasteful number, since it uses less digits than its factorization.

71804864 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 30372 (or 30362 counting only the distinct ones).

The product of its (nonzero) digits is 43008, while the sum is 38.

The square root of 71804864 is about 8473.7750737201. The cubic root of 71804864 is about 415.6405919415.

The spelling of 71804864 in words is "seventy-one million, eight hundred four thousand, eight hundred sixty-four".