88721388 has 36 divisors (see below), whose sum is σ = 256306960. Its totient is φ = 25348896.

The previous prime is 88721377. The next prime is 88721401. The reversal of 88721388 is 88312788.

It is a happy number.

It is a tau number, because it is divible by the number of its divisors (36).

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 175783 + ... + 176286.

Almost surely, 2^88721388 is an apocalyptic number.

It is an amenable number.

88721388 is an abundant number, since it is smaller than the sum of its proper divisors (167585572).

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

88721388 is a wasteful number, since it uses less digits than its factorization.

88721388 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 352086 (or 352081 counting only the distinct ones).

The product of its digits is 172032, while the sum is 45.

The square root of 88721388 is about 9419.2031510102. The cubic root of 88721388 is about 446.0081305870.

The spelling of 88721388 in words is "eighty-eight million, seven hundred twenty-one thousand, three hundred eighty-eight".