88721920 has 80 divisors (see below), whose sum is σ = 243163008. Its totient is φ = 30412800.

The previous prime is 88721917. The next prime is 88721921. The reversal of 88721920 is 2912788.

It is a tau number, because it is divible by the number of its divisors (80).

It is a self number, because there is not a number n which added to its sum of digits gives 88721920.

It is not an unprimeable number, because it can be changed into a prime (88721921) 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, 15445 + ... + 20395.

Almost surely, 2^88721920 is an apocalyptic number.

88721920 is a gapful number since it is divisible by the number (80) 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 88721920, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (121581504).

88721920 is an abundant number, since it is smaller than the sum of its proper divisors (154441088).

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

88721920 is an equidigital number, since it uses as much as digits as its factorization.

88721920 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4981 (or 4965 counting only the distinct ones).

The product of its (nonzero) digits is 16128, while the sum is 37.

The square root of 88721920 is about 9419.2313911486. The cubic root of 88721920 is about 446.0090220513.

The spelling of 88721920 in words is "eighty-eight million, seven hundred twenty-one thousand, nine hundred twenty".