85642470 has 24 divisors (see below), whose sum is σ = 222670656. Its totient is φ = 22837968.

The previous prime is 85642451. The next prime is 85642477. The reversal of 85642470 is 7424658.

85642470 is a `hidden beast` number, since 8 + 5 + 642 + 4 + 7 + 0 = 666.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (85642477) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 475702 + ... + 475881.

It is an arithmetic number, because the mean of its divisors is an integer number (9277944).

Almost surely, 2^85642470 is an apocalyptic number.

85642470 is an abundant number, since it is smaller than the sum of its proper divisors (137028186).

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

85642470 is a wasteful number, since it uses less digits than its factorization.

85642470 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 951596 (or 951593 counting only the distinct ones).

The product of its (nonzero) digits is 53760, while the sum is 36.

The square root of 85642470 is about 9254.3216931334. The cubic root of 85642470 is about 440.7879647692.

The spelling of 85642470 in words is "eighty-five million, six hundred forty-two thousand, four hundred seventy".