85077990 has 48 divisors (see below), whose sum is σ = 225920448. Its totient is φ = 22203648.

The previous prime is 85077977. The next prime is 85078001. The reversal of 85077990 is 9977058.

It is a Harshad number since it is a multiple of its sum of digits (45).

It is a Curzon number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 5827 + ... + 14286.

It is an arithmetic number, because the mean of its divisors is an integer number (4706676).

Almost surely, 2^85077990 is an apocalyptic number.

85077990 is an abundant number, since it is smaller than the sum of its proper divisors (140842458).

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

85077990 is a wasteful number, since it uses less digits than its factorization.

85077990 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 20173 (or 20170 counting only the distinct ones).

The product of its (nonzero) digits is 158760, while the sum is 45.

The square root of 85077990 is about 9223.7730891431. The cubic root of 85077990 is about 439.8174001269.

The spelling of 85077990 in words is "eighty-five million, seventy-seven thousand, nine hundred ninety".