90450788 has 6 divisors (see below), whose sum is σ = 158288886. Its totient is φ = 45225392.

The previous prime is 90450781. The next prime is 90450803. The reversal of 90450788 is 88705409.

It can be written as a sum of positive squares in only one way, i.e., 76597504 + 13853284 = 8752^2 + 3722^2 .

It is not an unprimeable number, because it can be changed into a prime (90450781) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 11306345 + ... + 11306352.

It is an arithmetic number, because the mean of its divisors is an integer number (26381481).

Almost surely, 2^90450788 is an apocalyptic number.

It is an amenable number.

90450788 is a deficient number, since it is larger than the sum of its proper divisors (67838098).

90450788 is a wasteful number, since it uses less digits than its factorization.

90450788 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 22612701 (or 22612699 counting only the distinct ones).

The product of its (nonzero) digits is 80640, while the sum is 41.

The square root of 90450788 is about 9510.5619182044. The cubic root of 90450788 is about 448.8874376194.

The spelling of 90450788 in words is "ninety million, four hundred fifty thousand, seven hundred eighty-eight".