81092428 has 12 divisors (see below), whose sum is σ = 141979320. Its totient is φ = 40526912.

The previous prime is 81092423. The next prime is 81092443. The reversal of 81092428 is 82429018.

It is a junction number, because it is equal to n+sod(n) for n = 81092393 and 81092402.

It is not an unprimeable number, because it can be changed into a prime (81092423) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 9075 + ... + 15637.

It is an arithmetic number, because the mean of its divisors is an integer number (11831610).

Almost surely, 2^81092428 is an apocalyptic number.

It is an amenable number.

81092428 is a deficient number, since it is larger than the sum of its proper divisors (60886892).

81092428 is a wasteful number, since it uses less digits than its factorization.

81092428 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 9656 (or 9654 counting only the distinct ones).

The product of its (nonzero) digits is 9216, while the sum is 34.

The square root of 81092428 is about 9005.1334248861. The cubic root of 81092428 is about 432.8393816743.

The spelling of 81092428 in words is "eighty-one million, ninety-two thousand, four hundred twenty-eight".