81883704 has 112 divisors (see below), whose sum is σ = 247062600. Its totient is φ = 22588608.

The previous prime is 81883699. The next prime is 81883717. The reversal of 81883704 is 40738818.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 27 ways as a sum of consecutive naturals, for example, 2823562 + ... + 2823590.

Almost surely, 2^81883704 is an apocalyptic number.

81883704 is a gapful number since it is divisible by the number (84) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 81883704, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (123531300).

81883704 is an abundant number, since it is smaller than the sum of its proper divisors (165178896).

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

81883704 is an frugal number, since it uses more digits than its factorization.

81883704 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 80 (or 41 counting only the distinct ones).

The product of its (nonzero) digits is 43008, while the sum is 39.

The square root of 81883704 is about 9048.9614873752. The cubic root of 81883704 is about 434.2426669260.

It can be divided in two parts, 81 and 883704, that added together give a triangular number (883785 = T₁₃₂₉).

The spelling of 81883704 in words is "eighty-one million, eight hundred eighty-three thousand, seven hundred four".