81465834 has 32 divisors (see below), whose sum is σ = 165003840. Its totient is φ = 26812800.

The previous prime is 81465829. The next prime is 81465851. The reversal of 81465834 is 43856418.

It is a junction number, because it is equal to n+sod(n) for n = 81465792 and 81465801.

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, 289774 + ... + 290054.

It is an arithmetic number, because the mean of its divisors is an integer number (5156370).

Almost surely, 2^81465834 is an apocalyptic number.

81465834 is an abundant number, since it is smaller than the sum of its proper divisors (83538006).

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

81465834 is a wasteful number, since it uses less digits than its factorization.

81465834 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 726.

The product of its digits is 92160, while the sum is 39.

The square root of 81465834 is about 9025.8425645476. The cubic root of 81465834 is about 433.5027291700.

The spelling of 81465834 in words is "eighty-one million, four hundred sixty-five thousand, eight hundred thirty-four".