81492486 has 16 divisors (see below), whose sum is σ = 163214400. Its totient is φ = 27125928.

The previous prime is 81492469. The next prime is 81492491. The reversal of 81492486 is 68429418.

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, 4756 + ... + 13623.

It is an arithmetic number, because the mean of its divisors is an integer number (10200900).

Almost surely, 2^81492486 is an apocalyptic number.

81492486 is an abundant number, since it is smaller than the sum of its proper divisors (81721914).

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

81492486 is a wasteful number, since it uses less digits than its factorization.

81492486 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 19123.

The product of its digits is 110592, while the sum is 42.

The square root of 81492486 is about 9027.3188710713. The cubic root of 81492486 is about 433.5499982907.

The spelling of 81492486 in words is "eighty-one million, four hundred ninety-two thousand, four hundred eighty-six".