87905490 has 32 divisors (see below), whose sum is σ = 211256640. Its totient is φ = 23409984.

The previous prime is 87905483. The next prime is 87905497. The reversal of 87905490 is 9450978.

It is an interprime number because it is at equal distance from previous prime (87905483) and next prime (87905497).

It is not an unprimeable number, because it can be changed into a prime (87905497) 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, 28441 + ... + 31379.

It is an arithmetic number, because the mean of its divisors is an integer number (6601770).

Almost surely, 2^87905490 is an apocalyptic number.

87905490 is an abundant number, since it is smaller than the sum of its proper divisors (123351150).

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

87905490 is a wasteful number, since it uses less digits than its factorization.

87905490 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3946.

The product of its (nonzero) digits is 90720, while the sum is 42.

The square root of 87905490 is about 9375.7927664811. The cubic root of 87905490 is about 444.6367274706.

The spelling of 87905490 in words is "eighty-seven million, nine hundred five thousand, four hundred ninety".