81883452 has 24 divisors (see below), whose sum is σ = 218356096. Its totient is φ = 23395248.

The previous prime is 81883433. The next prime is 81883453. The reversal of 81883452 is 25438818.

It is a super-2 number, since 2×81883452² = 13409799422872608, which contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 81883452.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (81883453) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 487318 + ... + 487485.

Almost surely, 2^81883452 is an apocalyptic number.

It is an amenable number.

81883452 is an abundant number, since it is smaller than the sum of its proper divisors (136472644).

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

81883452 is a wasteful number, since it uses less digits than its factorization.

81883452 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 974817 (or 974815 counting only the distinct ones).

The product of its digits is 61440, while the sum is 39.

The square root of 81883452 is about 9048.9475631147. The cubic root of 81883452 is about 434.2422214598.

The spelling of 81883452 in words is "eighty-one million, eight hundred eighty-three thousand, four hundred fifty-two".