85904092836 has 135 divisors (see below), whose sum is σ = 237288716049. Its totient is φ = 27095954112.

The previous prime is 85904092831. The next prime is 85904092849. The reversal of 85904092836 is 63829040958.

The square root of 85904092836 is 293094.

It is a perfect power (a square), and thus also a powerful number.

85904092836 is a `hidden beast` number, since 8 + 590 + 40 + 9 + 2 + 8 + 3 + 6 = 666.

It can be written as a sum of positive squares in only one way, i.e., 79608622500 + 6295470336 = 282150^2 + 79344^2 .

It is a super-2 number, since 2×85904092836² (a number of 23 digits) contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (54).

It is not an unprimeable number, because it can be changed into a prime (85904092831) by changing a digit.

It is a polite number, since it can be written in 44 ways as a sum of consecutive naturals, for example, 100237720 + ... + 100238576.

Almost surely, 2^85904092836 is an apocalyptic number.

85904092836 is the 293094-th square number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 85904092836

85904092836 is an abundant number, since it is smaller than the sum of its proper divisors (151384623213).

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

85904092836 is an equidigital number, since it uses as much as digits as its factorization.

85904092836 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1768 (or 881 counting only the distinct ones).

The product of its (nonzero) digits is 3732480, while the sum is 54.

The spelling of 85904092836 in words is "eighty-five billion, nine hundred four million, ninety-two thousand, eight hundred thirty-six".