85512978 has 24 divisors (see below), whose sum is σ = 185943888. Its totient is φ = 28401912.

The previous prime is 85512953. The next prime is 85512979. The reversal of 85512978 is 87921558.

It is a happy number.

85512978 is a `hidden beast` number, since 8 + 551 + 2 + 97 + 8 = 666.

It is not an unprimeable number, because it can be changed into a prime (85512979) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 3300 + ... + 13487.

It is an arithmetic number, because the mean of its divisors is an integer number (7747662).

Almost surely, 2^85512978 is an apocalyptic number.

85512978 is an abundant number, since it is smaller than the sum of its proper divisors (100430910).

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

85512978 is a wasteful number, since it uses less digits than its factorization.

85512978 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 17078 (or 17075 counting only the distinct ones).

The product of its digits is 201600, while the sum is 45.

The square root of 85512978 is about 9247.3227476930. The cubic root of 85512978 is about 440.5656945684.

The spelling of 85512978 in words is "eighty-five million, five hundred twelve thousand, nine hundred seventy-eight".