85138860 has 48 divisors (see below), whose sum is σ = 238807296. Its totient is φ = 22663872.

The previous prime is 85138849. The next prime is 85138871. The reversal of 85138860 is 6883158.

It is a happy number.

It is an interprime number because it is at equal distance from previous prime (85138849) and next prime (85138871).

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 52177 + ... + 53783.

It is an arithmetic number, because the mean of its divisors is an integer number (4975152).

Almost surely, 2^85138860 is an apocalyptic number.

It is an amenable number.

85138860 is an abundant number, since it is smaller than the sum of its proper divisors (153668436).

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

85138860 is a wasteful number, since it uses less digits than its factorization.

85138860 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2502 (or 2500 counting only the distinct ones).

The product of its (nonzero) digits is 46080, while the sum is 39.

The square root of 85138860 is about 9227.0721250026. The cubic root of 85138860 is about 439.9222658820.

The spelling of 85138860 in words is "eighty-five million, one hundred thirty-eight thousand, eight hundred sixty".