85644234 has 24 divisors (see below), whose sum is σ = 199837092. Its totient is φ = 26352000.

The previous prime is 85644211. The next prime is 85644239. The reversal of 85644234 is 43244658.

85644234 is a `hidden beast` number, since 8 + 5 + 644 + 2 + 3 + 4 = 666.

It can be written as a sum of positive squares in 2 ways, for example, as 84548025 + 1096209 = 9195^2 + 1047^2 .

It is not an unprimeable number, because it can be changed into a prime (85644239) 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, 182767 + ... + 183234.

Almost surely, 2^85644234 is an apocalyptic number.

85644234 is an abundant number, since it is smaller than the sum of its proper divisors (114192858).

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

85644234 is a wasteful number, since it uses less digits than its factorization.

85644234 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 366022 (or 366019 counting only the distinct ones).

The product of its digits is 92160, while the sum is 36.

The square root of 85644234 is about 9254.4169994657. The cubic root of 85644234 is about 440.7909910895.

The spelling of 85644234 in words is "eighty-five million, six hundred forty-four thousand, two hundred thirty-four".