81950752 has 48 divisors (see below), whose sum is σ = 179769240. Its totient is φ = 36513792.

The previous prime is 81950731. The next prime is 81950777. The reversal of 81950752 is 25705918.

It can be written as a sum of positive squares in 4 ways, for example, as 39388176 + 42562576 = 6276^2 + 6524^2 .

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, 8668 + ... + 15460.

Almost surely, 2^81950752 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 81950752, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (89884620).

81950752 is an abundant number, since it is smaller than the sum of its proper divisors (97818488).

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

81950752 is a wasteful number, since it uses less digits than its factorization.

81950752 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6845 (or 6837 counting only the distinct ones).

The product of its (nonzero) digits is 25200, while the sum is 37.

The square root of 81950752 is about 9052.6654638289. The cubic root of 81950752 is about 434.3611567591.

The spelling of 81950752 in words is "eighty-one million, nine hundred fifty thousand, seven hundred fifty-two".