90631992 has 32 divisors (see below), whose sum is σ = 247178880. Its totient is φ = 27464160.

The previous prime is 90631991. The next prime is 90631999. The reversal of 90631992 is 29913609.

It is a happy number.

It is a super-3 number, since 3×90631992³ (a number of 25 digits) contains 333 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 90631992.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (90631991) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 171388 + ... + 171915.

It is an arithmetic number, because the mean of its divisors is an integer number (7724340).

Almost surely, 2^90631992 is an apocalyptic number.

It is an amenable number.

90631992 is an abundant number, since it is smaller than the sum of its proper divisors (156546888).

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

90631992 is a wasteful number, since it uses less digits than its factorization.

90631992 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 343323 (or 343319 counting only the distinct ones).

The product of its (nonzero) digits is 26244, while the sum is 39.

The square root of 90631992 is about 9520.0836130782. The cubic root of 90631992 is about 449.1869962485.

The spelling of 90631992 in words is "ninety million, six hundred thirty-one thousand, nine hundred ninety-two".