90387880 has 32 divisors (see below), whose sum is σ = 221862240. Its totient is φ = 32868160.

The previous prime is 90387877. The next prime is 90387881. The reversal of 90387880 is 8878309.

It is a happy number.

It is not an unprimeable number, because it can be changed into a prime (90387881) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 102274 + ... + 103153.

It is an arithmetic number, because the mean of its divisors is an integer number (6933195).

Almost surely, 2^90387880 is an apocalyptic number.

It is an amenable number.

90387880 is an abundant number, since it is smaller than the sum of its proper divisors (131474360).

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

90387880 is a wasteful number, since it uses less digits than its factorization.

90387880 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 205449 (or 205445 counting only the distinct ones).

The product of its (nonzero) digits is 96768, while the sum is 43.

The square root of 90387880 is about 9507.2540725490. The cubic root of 90387880 is about 448.7833472786.

The spelling of 90387880 in words is "ninety million, three hundred eighty-seven thousand, eight hundred eighty".