85564940 has 24 divisors (see below), whose sum is σ = 182220192. Its totient is φ = 33743360.

The previous prime is 85564939. The next prime is 85564967. The reversal of 85564940 is 4946558.

It is a happy 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, 28709 + ... + 31548.

It is an arithmetic number, because the mean of its divisors is an integer number (7592508).

Almost surely, 2^85564940 is an apocalyptic number.

It is an amenable number.

85564940 is an abundant number, since it is smaller than the sum of its proper divisors (96655252).

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

85564940 is a wasteful number, since it uses less digits than its factorization.

85564940 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 60337 (or 60335 counting only the distinct ones).

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

The square root of 85564940 is about 9250.1318909516. The cubic root of 85564940 is about 440.6549131479.

The spelling of 85564940 in words is "eighty-five million, five hundred sixty-four thousand, nine hundred forty".