85500570 has 32 divisors (see below), whose sum is σ = 216002880. Its totient is φ = 21600000.

The previous prime is 85500557. The next prime is 85500601. The reversal of 85500570 is 7500558.

It is a happy number.

It is a super-4 number, since 4×85500570⁴ (a number of 33 digits) contains 4444 as substring.

It is a Harshad number since it is a multiple of its sum of digits (30).

It is a Curzon number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 74431 + ... + 75570.

It is an arithmetic number, because the mean of its divisors is an integer number (6750090).

Almost surely, 2^85500570 is an apocalyptic number.

85500570 is an abundant number, since it is smaller than the sum of its proper divisors (130502310).

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

85500570 is a wasteful number, since it uses less digits than its factorization.

85500570 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 150030.

The product of its (nonzero) digits is 7000, while the sum is 30.

The square root of 85500570 is about 9246.6518264721. The cubic root of 85500570 is about 440.5443847287.

The spelling of 85500570 in words is "eighty-five million, five hundred thousand, five hundred seventy".