90047808 has 168 divisors, whose sum is σ = 280090880. Its totient is φ = 28339200.

The previous prime is 90047803. The next prime is 90047819. The reversal of 90047808 is 80874009.

It is a Harshad number since it is a multiple of its sum of digits (36).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (90047801) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 2196268 + ... + 2196308.

Almost surely, 2^90047808 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 90047808, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (140045440).

90047808 is an abundant number, since it is smaller than the sum of its proper divisors (190043072).

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

90047808 is a wasteful number, since it uses less digits than its factorization.

90047808 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 134 (or 77 counting only the distinct ones).

The product of its (nonzero) digits is 16128, while the sum is 36.

The square root of 90047808 is about 9489.3523488171. The cubic root of 90047808 is about 448.2198113495.

The spelling of 90047808 in words is "ninety million, forty-seven thousand, eight hundred eight".