85520988 has 48 divisors (see below), whose sum is σ = 253397760. Its totient is φ = 24434352.

The previous prime is 85520987. The next prime is 85520989. The reversal of 85520988 is 88902558.

85520988 is a `hidden beast` number, since 8 + 552 + 0 + 98 + 8 = 666.

It is an interprime number because it is at equal distance from previous prime (85520987) and next prime (85520989).

It is a super-2 number, since 2×85520988² = 14627678776992288, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (85520983) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 55806 + ... + 57317.

It is an arithmetic number, because the mean of its divisors is an integer number (5279120).

Almost surely, 2^85520988 is an apocalyptic number.

It is an amenable number.

85520988 is an abundant number, since it is smaller than the sum of its proper divisors (167876772).

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

85520988 is a wasteful number, since it uses less digits than its factorization.

85520988 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 113143 (or 113135 counting only the distinct ones).

The product of its (nonzero) digits is 230400, while the sum is 45.

The square root of 85520988 is about 9247.7558358772. The cubic root of 85520988 is about 440.5794500673.

The spelling of 85520988 in words is "eighty-five million, five hundred twenty thousand, nine hundred eighty-eight".