90630388 has 12 divisors (see below), whose sum is σ = 158779012. Its totient is φ = 45264960.

The previous prime is 90630367. The next prime is 90630389. The reversal of 90630388 is 88303609.

It is a happy number.

It can be written as a sum of positive squares in 2 ways, for example, as 31832164 + 58798224 = 5642^2 + 7668^2 .

It is a hoax number, since the sum of its digits (37) coincides with the sum of the digits of its distinct prime factors.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (90630389) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 8343 + ... + 15838.

Almost surely, 2^90630388 is an apocalyptic number.

It is an amenable number.

90630388 is a deficient number, since it is larger than the sum of its proper divisors (68148624).

90630388 is a wasteful number, since it uses less digits than its factorization.

90630388 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 25122 (or 25120 counting only the distinct ones).

The product of its (nonzero) digits is 31104, while the sum is 37.

The square root of 90630388 is about 9519.9993697479. Note that the first 3 decimals coincide. The cubic root of 90630388 is about 449.1843463373.

The spelling of 90630388 in words is "ninety million, six hundred thirty thousand, three hundred eighty-eight".