81874752 has 112 divisors (see below), whose sum is σ = 227453952. Its totient is φ = 25966080.

The previous prime is 81874739. The next prime is 81874759. The reversal of 81874752 is 25747818.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (81874759) by changing a digit.

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 15 ways as a sum of consecutive naturals, for example, 387927 + ... + 388137.

Almost surely, 2^81874752 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 81874752, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (113726976).

81874752 is an abundant number, since it is smaller than the sum of its proper divisors (145579200).

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

81874752 is a wasteful number, since it uses less digits than its factorization.

81874752 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 316 (or 306 counting only the distinct ones).

The product of its digits is 125440, while the sum is 42.

The square root of 81874752 is about 9048.4668314582. The cubic root of 81874752 is about 434.2268417095.

The spelling of 81874752 in words is "eighty-one million, eight hundred seventy-four thousand, seven hundred fifty-two".