81883442 has 16 divisors (see below), whose sum is σ = 126563712. Its totient is φ = 39702960.

The previous prime is 81883433. The next prime is 81883453. The reversal of 81883442 is 24438818.

It is a junction number, because it is equal to n+sod(n) for n = 81883396 and 81883405.

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, 22823 + ... + 26165.

It is an arithmetic number, because the mean of its divisors is an integer number (7910232).

Almost surely, 2^81883442 is an apocalyptic number.

81883442 is a deficient number, since it is larger than the sum of its proper divisors (44680270).

81883442 is a wasteful number, since it uses less digits than its factorization.

81883442 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3713.

The product of its digits is 49152, while the sum is 38.

The square root of 81883442 is about 9048.9470105643. The cubic root of 81883442 is about 434.2422037825.

The spelling of 81883442 in words is "eighty-one million, eight hundred eighty-three thousand, four hundred forty-two".