81862692 has 48 divisors (see below), whose sum is σ = 198062592. Its totient is φ = 26288640.

The previous prime is 81862663. The next prime is 81862699. The reversal of 81862692 is 29626818.

It is not an unprimeable number, because it can be changed into a prime (81862699) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 125038 + ... + 125690.

It is an arithmetic number, because the mean of its divisors is an integer number (4126304).

Almost surely, 2^81862692 is an apocalyptic number.

It is an amenable number.

81862692 is an abundant number, since it is smaller than the sum of its proper divisors (116199900).

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

81862692 is a wasteful number, since it uses less digits than its factorization.

81862692 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1028 (or 1026 counting only the distinct ones).

The product of its digits is 82944, while the sum is 42.

The square root of 81862692 is about 9047.8003956763. The cubic root of 81862692 is about 434.2055203916.

It can be divided in two parts, 8186 and 2692, that added together give a triangular number (10878 = T₁₄₇).

The spelling of 81862692 in words is "eighty-one million, eight hundred sixty-two thousand, six hundred ninety-two".