90312080 has 20 divisors (see below), whose sum is σ = 209975772. Its totient is φ = 36124800.

The previous prime is 90312049. The next prime is 90312107. The reversal of 90312080 is 8021309.

It can be written as a sum of positive squares in 2 ways, for example, as 62980096 + 27331984 = 7936^2 + 5228^2 .

It is a tau number, because it is divible by the number of its divisors (20).

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, 564371 + ... + 564530.

Almost surely, 2^90312080 is an apocalyptic number.

It is an amenable number.

90312080 is an abundant number, since it is smaller than the sum of its proper divisors (119663692).

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

90312080 is a wasteful number, since it uses less digits than its factorization.

90312080 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1128914 (or 1128908 counting only the distinct ones).

The product of its (nonzero) digits is 432, while the sum is 23.

The square root of 90312080 is about 9503.2668067355. The cubic root of 90312080 is about 448.6578610912.

Adding to 90312080 its reverse (8021309), we get a palindrome (98333389).

It can be divided in two parts, 9031 and 2080, that added together give a palindrome (11111).

The spelling of 90312080 in words is "ninety million, three hundred twelve thousand, eighty".