85645904 has 10 divisors (see below), whose sum is σ = 165938970. Its totient is φ = 42822944.

The previous prime is 85645897. The next prime is 85645909. The reversal of 85645904 is 40954658.

It is a happy number.

It can be written as a sum of positive squares in only one way, i.e., 83685904 + 1960000 = 9148^2 + 1400^2 .

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (85645909) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 2676419 + ... + 2676450.

It is an arithmetic number, because the mean of its divisors is an integer number (16593897).

Almost surely, 2^85645904 is an apocalyptic number.

It is an amenable number.

85645904 is a deficient number, since it is larger than the sum of its proper divisors (80293066).

85645904 is a wasteful number, since it uses less digits than its factorization.

85645904 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5352877 (or 5352871 counting only the distinct ones).

The product of its (nonzero) digits is 172800, while the sum is 41.

The square root of 85645904 is about 9254.5072262115. The cubic root of 85645904 is about 440.7938561050.

The spelling of 85645904 in words is "eighty-five million, six hundred forty-five thousand, nine hundred four".