81052488 has 160 divisors (see below), whose sum is σ = 252473760. Its totient is φ = 24088320.

The previous prime is 81052457. The next prime is 81052493. The reversal of 81052488 is 88425018.

It is a Harshad number since it is a multiple of its sum of digits (36).

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 39 ways as a sum of consecutive naturals, for example, 591556 + ... + 591692.

It is an arithmetic number, because the mean of its divisors is an integer number (1577961).

Almost surely, 2^81052488 is an apocalyptic number.

81052488 is a gapful number since it is divisible by the number (88) 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 81052488, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (126236880).

81052488 is an abundant number, since it is smaller than the sum of its proper divisors (171421272).

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

81052488 is a wasteful number, since it uses less digits than its factorization.

81052488 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 249 (or 236 counting only the distinct ones).

The product of its (nonzero) digits is 20480, while the sum is 36.

The square root of 81052488 is about 9002.9155277610. The cubic root of 81052488 is about 432.7683086848.

The spelling of 81052488 in words is "eighty-one million, fifty-two thousand, four hundred eighty-eight".