81862464 has 56 divisors (see below), whose sum is σ = 217261440. Its totient is φ = 27203584.

The previous prime is 81862457. The next prime is 81862477. The reversal of 81862464 is 46426818.

It is a hoax number, since the sum of its digits (39) coincides with the sum of the digits of its distinct prime factors.

It is a nude number because it is divisible by every one of its digits.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 113497 + ... + 114215.

Almost surely, 2^81862464 is an apocalyptic number.

It is an amenable number.

81862464 is an abundant number, since it is smaller than the sum of its proper divisors (135398976).

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

81862464 is a wasteful number, since it uses less digits than its factorization.

81862464 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1327 (or 1317 counting only the distinct ones).

The product of its digits is 73728, while the sum is 39.

The square root of 81862464 is about 9047.7877959201. The cubic root of 81862464 is about 434.2051172818.

The spelling of 81862464 in words is "eighty-one million, eight hundred sixty-two thousand, four hundred sixty-four".