81452792 has 24 divisors (see below), whose sum is σ = 155089200. Its totient is φ = 40098864.

The previous prime is 81452741. The next prime is 81452801. The reversal of 81452792 is 29725418.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 226709 + ... + 227067.

It is an arithmetic number, because the mean of its divisors is an integer number (6462050).

Almost surely, 2^81452792 is an apocalyptic number.

It is an amenable number.

81452792 is a deficient number, since it is larger than the sum of its proper divisors (73636408).

81452792 is an equidigital number, since it uses as much as digits as its factorization.

81452792 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 803 (or 440 counting only the distinct ones).

The product of its digits is 40320, while the sum is 38.

The square root of 81452792 is about 9025.1200546032. The cubic root of 81452792 is about 433.4795945460.

The spelling of 81452792 in words is "eighty-one million, four hundred fifty-two thousand, seven hundred ninety-two".