88640321 has 16 divisors (see below), whose sum is σ = 115319808. Its totient is φ = 66066000.

The previous prime is 88640317. The next prime is 88640333. The reversal of 88640321 is 12304688.

It is not a de Polignac number, because 88640321 - 2² = 88640317 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (88640311) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 23255 + ... + 26796.

It is an arithmetic number, because the mean of its divisors is an integer number (7207488).

Almost surely, 2^88640321 is an apocalyptic number.

It is an amenable number.

88640321 is a deficient number, since it is larger than the sum of its proper divisors (26679487).

88640321 is a wasteful number, since it uses less digits than its factorization.

88640321 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 50092.

The product of its (nonzero) digits is 9216, while the sum is 32.

The square root of 88640321 is about 9414.8988842154. The cubic root of 88640321 is about 445.8722461819.

The spelling of 88640321 in words is "eighty-eight million, six hundred forty thousand, three hundred twenty-one".