81200884 has 12 divisors (see below), whose sum is σ = 142347744. Its totient is φ = 40530104.

The previous prime is 81200849. The next prime is 81200939. The reversal of 81200884 is 48800218.

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, 14944 + ... + 19639.

It is an arithmetic number, because the mean of its divisors is an integer number (11862312).

Almost surely, 2^81200884 is an apocalyptic number.

It is an amenable number.

81200884 is a deficient number, since it is larger than the sum of its proper divisors (61146860).

81200884 is a wasteful number, since it uses less digits than its factorization.

81200884 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 35174 (or 35172 counting only the distinct ones).

The product of its (nonzero) digits is 4096, while the sum is 31.

The square root of 81200884 is about 9011.1533113137. The cubic root of 81200884 is about 433.0322608224.

The spelling of 81200884 in words is "eighty-one million, two hundred thousand, eight hundred eighty-four".