81884024 has 8 divisors (see below), whose sum is σ = 153532560. Its totient is φ = 40942008.

The previous prime is 81884009. The next prime is 81884041. The reversal of 81884024 is 42048818.

It is a tau number, because it is divible by the number of its divisors (8).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 5117744 + ... + 5117759.

It is an arithmetic number, because the mean of its divisors is an integer number (19191570).

Almost surely, 2^81884024 is an apocalyptic number.

It is an amenable number.

81884024 is a deficient number, since it is larger than the sum of its proper divisors (71648536).

81884024 is a wasteful number, since it uses less digits than its factorization.

81884024 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 10235509 (or 10235505 counting only the distinct ones).

The product of its (nonzero) digits is 16384, while the sum is 35.

The square root of 81884024 is about 9048.9791689450. The cubic root of 81884024 is about 434.2432325960.

The spelling of 81884024 in words is "eighty-one million, eight hundred eighty-four thousand, twenty-four".