85031658 has 12 divisors (see below), whose sum is σ = 184235298. Its totient is φ = 28343880.

The previous prime is 85031657. The next prime is 85031689. The reversal of 85031658 is 85613058.

It can be written as a sum of positive squares in only one way, i.e., 67617729 + 17413929 = 8223^2 + 4173^2 .

It is not an unprimeable number, because it can be changed into a prime (85031651) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 2361973 + ... + 2362008.

Almost surely, 2^85031658 is an apocalyptic number.

85031658 is an abundant number, since it is smaller than the sum of its proper divisors (99203640).

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

85031658 is a wasteful number, since it uses less digits than its factorization.

85031658 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4723989 (or 4723986 counting only the distinct ones).

The product of its (nonzero) digits is 28800, while the sum is 36.

The square root of 85031658 is about 9221.2611935678. The cubic root of 85031658 is about 439.7375466497.

The spelling of 85031658 in words is "eighty-five million, thirty-one thousand, six hundred fifty-eight".