81938352 has 40 divisors (see below), whose sum is σ = 213629680. Its totient is φ = 27060480.

The previous prime is 81938341. The next prime is 81938357. The reversal of 81938352 is 25383918.

It is a self number, because there is not a number n which added to its sum of digits gives 81938352.

It is not an unprimeable number, because it can be changed into a prime (81938357) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 2599 + ... + 13062.

It is an arithmetic number, because the mean of its divisors is an integer number (5340742).

Almost surely, 2^81938352 is an apocalyptic number.

It is an amenable number.

81938352 is an abundant number, since it is smaller than the sum of its proper divisors (131691328).

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

81938352 is a wasteful number, since it uses less digits than its factorization.

81938352 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 15781 (or 15775 counting only the distinct ones).

The product of its digits is 51840, while the sum is 39.

The square root of 81938352 is about 9051.9805567621. The cubic root of 81938352 is about 434.3392478692.

The spelling of 81938352 in words is "eighty-one million, nine hundred thirty-eight thousand, three hundred fifty-two".