81369032 has 48 divisors (see below), whose sum is σ = 164280960. Its totient is φ = 37694976.

The previous prime is 81369019. The next prime is 81369047. The reversal of 81369032 is 23096318.

It is a self number, because there is not a number n which added to its sum of digits gives 81369032.

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, 838808 + ... + 838904.

It is an arithmetic number, because the mean of its divisors is an integer number (3422520).

Almost surely, 2^81369032 is an apocalyptic number.

It is an amenable number.

81369032 is an abundant number, since it is smaller than the sum of its proper divisors (82911928).

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

81369032 is a wasteful number, since it uses less digits than its factorization.

81369032 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 270 (or 169 counting only the distinct ones).

The product of its (nonzero) digits is 7776, while the sum is 32.

The square root of 81369032 is about 9020.4784795486. The cubic root of 81369032 is about 433.3309575149.

The spelling of 81369032 in words is "eighty-one million, three hundred sixty-nine thousand, thirty-two".