85570000 has 100 divisors (see below), whose sum is σ = 213056800. Its totient is φ = 33264000.

The previous prime is 85569989. The next prime is 85570003. The reversal of 85570000 is 7558.

It is a tau number, because it is divible by the number of its divisors (100).

It is a Harshad number since it is a multiple of its sum of digits (25).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (85570003) by changing a digit.

It is a polite number, since it can be written in 19 ways as a sum of consecutive naturals, for example, 429901 + ... + 430099.

It is an arithmetic number, because the mean of its divisors is an integer number (2130568).

Almost surely, 2^85570000 is an apocalyptic number.

85570000 is a gapful number since it is divisible by the number (80) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 85570000, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (106528400).

85570000 is an abundant number, since it is smaller than the sum of its proper divisors (127486800).

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

85570000 is a wasteful number, since it uses less digits than its factorization.

85570000 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 270 (or 249 counting only the distinct ones).

The product of its (nonzero) digits is 1400, while the sum is 25.

The square root of 85570000 is about 9250.4053965218. The cubic root of 85570000 is about 440.6635992207.

Adding to 85570000 its reverse (7558), we get a palindrome (85577558).

The spelling of 85570000 in words is "eighty-five million, five hundred seventy thousand".