85993978 has 16 divisors (see below), whose sum is σ = 148305024. Its totient is φ = 36632880.

The previous prime is 85993913. The next prime is 85993997. The reversal of 85993978 is 87939958.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 16053 + ... + 20728.

It is an arithmetic number, because the mean of its divisors is an integer number (9269064).

Almost surely, 2^85993978 is an apocalyptic number.

85993978 is a deficient number, since it is larger than the sum of its proper divisors (62311046).

85993978 is a wasteful number, since it uses less digits than its factorization.

85993978 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 36957.

The product of its digits is 4898880, while the sum is 58.

The square root of 85993978 is about 9273.2938053315. The cubic root of 85993978 is about 441.3901932371.

The spelling of 85993978 in words is "eighty-five million, nine hundred ninety-three thousand, nine hundred seventy-eight".