85136824 has 8 divisors (see below), whose sum is σ = 159631560. Its totient is φ = 42568408.

The previous prime is 85136809. The next prime is 85136827. The reversal of 85136824 is 42863158.

It is a happy number.

It is a tau number, because it is divible by the number of its divisors (8).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (85136827) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 5321044 + ... + 5321059.

It is an arithmetic number, because the mean of its divisors is an integer number (19953945).

Almost surely, 2^85136824 is an apocalyptic number.

It is an amenable number.

85136824 is a deficient number, since it is larger than the sum of its proper divisors (74494736).

85136824 is a wasteful number, since it uses less digits than its factorization.

85136824 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 10642109 (or 10642105 counting only the distinct ones).

The product of its digits is 46080, while the sum is 37.

The square root of 85136824 is about 9226.9617968213. The cubic root of 85136824 is about 439.9187591054.

It can be divided in two parts, 851 and 36824, that added together give a triangular number (37675 = T₂₇₄).

The spelling of 85136824 in words is "eighty-five million, one hundred thirty-six thousand, eight hundred twenty-four".