81793460 has 48 divisors (see below), whose sum is σ = 207857664. Its totient is φ = 26393088.

The previous prime is 81793447. The next prime is 81793471. The reversal of 81793460 is 6439718.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 14804 + ... + 19563.

It is an arithmetic number, because the mean of its divisors is an integer number (4330368).

Almost surely, 2^81793460 is an apocalyptic number.

It is an amenable number.

81793460 is an abundant number, since it is smaller than the sum of its proper divisors (126064204).

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

81793460 is a wasteful number, since it uses less digits than its factorization.

81793460 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 34400 (or 34398 counting only the distinct ones).

The product of its (nonzero) digits is 36288, while the sum is 38.

The square root of 81793460 is about 9043.9736841722. The cubic root of 81793460 is about 434.0830820577.

The spelling of 81793460 in words is "eighty-one million, seven hundred ninety-three thousand, four hundred sixty".