81852912 has 60 divisors (see below), whose sum is σ = 241139080. Its totient is φ = 25847424.

The previous prime is 81852899. The next prime is 81852937. The reversal of 81852912 is 21925818.

It is a Harshad number since it is a multiple of its sum of digits (36).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 12223 + ... + 17694.

Almost surely, 2^81852912 is an apocalyptic number.

It is an amenable number.

81852912 is an abundant number, since it is smaller than the sum of its proper divisors (159286168).

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

81852912 is a wasteful number, since it uses less digits than its factorization.

81852912 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 29950 (or 29941 counting only the distinct ones).

The product of its digits is 11520, while the sum is 36.

The square root of 81852912 is about 9047.2599166820. The cubic root of 81852912 is about 434.1882284319.

The spelling of 81852912 in words is "eighty-one million, eight hundred fifty-two thousand, nine hundred twelve".