81192732 has 24 divisors (see below), whose sum is σ = 192662400. Its totient is φ = 26605296.

The previous prime is 81192701. The next prime is 81192773. The reversal of 81192732 is 23729118.

It is a junction number, because it is equal to n+sod(n) for n = 81192693 and 81192702.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 56632 + ... + 58047.

It is an arithmetic number, because the mean of its divisors is an integer number (8027600).

Almost surely, 2^81192732 is an apocalyptic number.

It is an amenable number.

81192732 is an abundant number, since it is smaller than the sum of its proper divisors (111469668).

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

81192732 is a wasteful number, since it uses less digits than its factorization.

81192732 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 114745 (or 114743 counting only the distinct ones).

The product of its digits is 6048, while the sum is 33.

The square root of 81192732 is about 9010.7009716226. The cubic root of 81192732 is about 433.0177692022.

It can be divided in two parts, 8 and 1192732, that added together give a triangular number (1192740 = T₁₅₄₄).

The spelling of 81192732 in words is "eighty-one million, one hundred ninety-two thousand, seven hundred thirty-two".