85501990 has 16 divisors (see below), whose sum is σ = 175889952. Its totient is φ = 29314944.

The previous prime is 85501973. The next prime is 85502023. The reversal of 85501990 is 9910558.

It is a congruent number.

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, 610659 + ... + 610798.

It is an arithmetic number, because the mean of its divisors is an integer number (10993122).

Almost surely, 2^85501990 is an apocalyptic number.

85501990 is an abundant number, since it is smaller than the sum of its proper divisors (90387962).

85501990 is a wasteful number, since it uses less digits than its factorization.

85501990 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1221471.

The product of its (nonzero) digits is 16200, while the sum is 37.

The square root of 85501990 is about 9246.7286107034. The cubic root of 85501990 is about 440.5468235801.

The spelling of 85501990 in words is "eighty-five million, five hundred one thousand, nine hundred ninety".