90232780 has 24 divisors (see below), whose sum is σ = 206715600. Its totient is φ = 32811840.

The previous prime is 90232763. The next prime is 90232783. The reversal of 90232780 is 8723209.

It is not an unprimeable number, because it can be changed into a prime (90232783) 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, 204855 + ... + 205294.

It is an arithmetic number, because the mean of its divisors is an integer number (8613150).

Almost surely, 2^90232780 is an apocalyptic number.

It is an amenable number.

90232780 is an abundant number, since it is smaller than the sum of its proper divisors (116482820).

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

90232780 is a wasteful number, since it uses less digits than its factorization.

90232780 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 410169 (or 410167 counting only the distinct ones).

The product of its (nonzero) digits is 6048, while the sum is 31.

The square root of 90232780 is about 9499.0936409744. The cubic root of 90232780 is about 448.5265055113.

Adding to 90232780 its reverse (8723209), we get a palindrome (98955989).

The spelling of 90232780 in words is "ninety million, two hundred thirty-two thousand, seven hundred eighty".