85109408 has 24 divisors (see below), whose sum is σ = 167856948. Its totient is φ = 42479104.

The previous prime is 85109393. The next prime is 85109419. The reversal of 85109408 is 80490158.

It can be written as a sum of positive squares in 2 ways, for example, as 74166544 + 10942864 = 8612^2 + 3308^2 .

It is a super-2 number, since 2×85109408² = 14487222660220928, which contains 22 as substring.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 18860 + ... + 22932.

Almost surely, 2^85109408 is an apocalyptic number.

It is an amenable number.

85109408 is a deficient number, since it is larger than the sum of its proper divisors (82747540).

85109408 is a wasteful number, since it uses less digits than its factorization.

85109408 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4736 (or 4728 counting only the distinct ones).

The product of its (nonzero) digits is 11520, while the sum is 35.

The square root of 85109408 is about 9225.4760310783. The cubic root of 85109408 is about 439.8715327429.

The spelling of 85109408 in words is "eighty-five million, one hundred nine thousand, four hundred eight".