85128510 has 16 divisors (see below), whose sum is σ = 204308496. Its totient is φ = 22700928.

The previous prime is 85128499. The next prime is 85128521. The reversal of 85128510 is 1582158.

It is an interprime number because it is at equal distance from previous prime (85128499) and next prime (85128521).

It is a Harshad number since it is a multiple of its sum of digits (30), and also a Moran number because the ratio is a prime number: 2837617 = 85128510 / (8 + 5 + 1 + 2 + 8 + 5 + 1 + 0).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1418779 + ... + 1418838.

It is an arithmetic number, because the mean of its divisors is an integer number (12769281).

Almost surely, 2^85128510 is an apocalyptic number.

85128510 is an abundant number, since it is smaller than the sum of its proper divisors (119179986).

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

85128510 is a wasteful number, since it uses less digits than its factorization.

85128510 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2837627.

The product of its (nonzero) digits is 3200, while the sum is 30.

The square root of 85128510 is about 9226.5112583251. The cubic root of 85128510 is about 439.9044386134.

The spelling of 85128510 in words is "eighty-five million, one hundred twenty-eight thousand, five hundred ten".