85424978 has 16 divisors (see below), whose sum is σ = 129821400. Its totient is φ = 42155136.

The previous prime is 85424957. The next prime is 85424987. The reversal of 85424978 is 87942458.

It is a happy number.

It can be written as a sum of positive squares in 4 ways, for example, as 68343289 + 17081689 = 8267^2 + 4133^2 .

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, 50726 + ... + 52382.

Almost surely, 2^85424978 is an apocalyptic number.

85424978 is a deficient number, since it is larger than the sum of its proper divisors (44396422).

85424978 is a wasteful number, since it uses less digits than its factorization.

85424978 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1981.

The product of its digits is 645120, while the sum is 47.

The square root of 85424978 is about 9242.5633890171. The cubic root of 85424978 is about 440.4145163934.

The spelling of 85424978 in words is "eighty-five million, four hundred twenty-four thousand, nine hundred seventy-eight".