90619418 has 12 divisors (see below), whose sum is σ = 144396222. Its totient is φ = 42644160.

The previous prime is 90619411. The next prime is 90619421. The reversal of 90619418 is 81491609.

It is a happy number.

It can be written as a sum of positive squares in 3 ways, for example, as 90193009 + 426409 = 9497^2 + 653^2 .

It is a hoax number, since the sum of its digits (38) coincides with the sum of the digits of its distinct prime factors.

It is not an unprimeable number, because it can be changed into a prime (90619411) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 77813 + ... + 78968.

Almost surely, 2^90619418 is an apocalyptic number.

90619418 is a deficient number, since it is larger than the sum of its proper divisors (53776804).

90619418 is a wasteful number, since it uses less digits than its factorization.

90619418 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 156817 (or 156800 counting only the distinct ones).

The product of its (nonzero) digits is 15552, while the sum is 38.

The square root of 90619418 is about 9519.4231968119. The cubic root of 90619418 is about 449.1662223533.

The spelling of 90619418 in words is "ninety million, six hundred nineteen thousand, four hundred eighteen".