87991230 has 32 divisors (see below), whose sum is σ = 211880448. Its totient is φ = 23386400.

The previous prime is 87991213. The next prime is 87991247. The reversal of 87991230 is 3219978.

It is an interprime number because it is at equal distance from previous prime (87991213) and next prime (87991247).

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 4615 + ... + 14045.

It is an arithmetic number, because the mean of its divisors is an integer number (6621264).

Almost surely, 2^87991230 is an apocalyptic number.

87991230 is an abundant number, since it is smaller than the sum of its proper divisors (123889218).

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

87991230 is a wasteful number, since it uses less digits than its factorization.

87991230 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 9752.

The product of its (nonzero) digits is 27216, while the sum is 39.

The square root of 87991230 is about 9380.3640654294. The cubic root of 87991230 is about 444.7812416340.

The spelling of 87991230 in words is "eighty-seven million, nine hundred ninety-one thousand, two hundred thirty".