81962272 has 24 divisors (see below), whose sum is σ = 184415616. Its totient is φ = 35126592.

The previous prime is 81962261. The next prime is 81962281. The reversal of 81962272 is 27226918.

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, 182728 + ... + 183175.

It is an arithmetic number, because the mean of its divisors is an integer number (7683984).

Almost surely, 2^81962272 is an apocalyptic number.

It is an amenable number.

81962272 is an abundant number, since it is smaller than the sum of its proper divisors (102453344).

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

81962272 is a wasteful number, since it uses less digits than its factorization.

81962272 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 365920 (or 365912 counting only the distinct ones).

The product of its digits is 24192, while the sum is 37.

The square root of 81962272 is about 9053.3017181579. The cubic root of 81962272 is about 434.3815088444.

The spelling of 81962272 in words is "eighty-one million, nine hundred sixty-two thousand, two hundred seventy-two".