87085390 has 32 divisors (see below), whose sum is σ = 189687744. Its totient is φ = 28101120.

The previous prime is 87085387. The next prime is 87085399. The reversal of 87085390 is 9358078.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (87085399) 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, 35401 + ... + 37780.

It is an arithmetic number, because the mean of its divisors is an integer number (5927742).

Almost surely, 2^87085390 is an apocalyptic number.

87085390 is an abundant number, since it is smaller than the sum of its proper divisors (102602354).

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

87085390 is a wasteful number, since it uses less digits than its factorization.

87085390 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 73212.

The product of its (nonzero) digits is 60480, while the sum is 40.

The square root of 87085390 is about 9331.9553149380. The cubic root of 87085390 is about 443.2496830259.

The spelling of 87085390 in words is "eighty-seven million, eighty-five thousand, three hundred ninety".