81433024 has 28 divisors (see below), whose sum is σ = 163878768. Its totient is φ = 40140800.

The previous prime is 81433021. The next prime is 81433057. The reversal of 81433024 is 42033418.

It is a self number, because there is not a number n which added to its sum of digits gives 81433024.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (81433021) by changing a digit.

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 3 ways as a sum of consecutive naturals, for example, 4417 + ... + 13504.

Almost surely, 2^81433024 is an apocalyptic number.

It is an amenable number.

81433024 is an abundant number, since it is smaller than the sum of its proper divisors (82445744).

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

81433024 is a wasteful number, since it uses less digits than its factorization.

81433024 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 18004 (or 17994 counting only the distinct ones).

The product of its (nonzero) digits is 2304, while the sum is 25.

The square root of 81433024 is about 9024.0248226609. The cubic root of 81433024 is about 433.4445242608. Note that the first 3 decimals are identical.

The spelling of 81433024 in words is "eighty-one million, four hundred thirty-three thousand, twenty-four".