90049688 has 16 divisors (see below), whose sum is σ = 170878680. Its totient is φ = 44482048.

The previous prime is 90049649. The next prime is 90049723. The reversal of 90049688 is 88694009.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 67145 + ... + 68472.

Almost surely, 2^90049688 is an apocalyptic number.

It is an amenable number.

90049688 is a deficient number, since it is larger than the sum of its proper divisors (80828992).

90049688 is a wasteful number, since it uses less digits than its factorization.

90049688 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 135706 (or 135702 counting only the distinct ones).

The product of its (nonzero) digits is 124416, while the sum is 44.

The square root of 90049688 is about 9489.4514066936. The cubic root of 90049688 is about 448.2229306088. Note that the first 3 decimals are identical.

The spelling of 90049688 in words is "ninety million, forty-nine thousand, six hundred eighty-eight".