90647808 has 144 divisors (see below), whose sum is σ = 262253376. Its totient is φ = 27688960.

The previous prime is 90647801. The next prime is 90647833. The reversal of 90647808 is 80874609.

It is a happy number.

It is a self number, because there is not a number n which added to its sum of digits gives 90647808.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (90647801) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 691903 + ... + 692033.

It is an arithmetic number, because the mean of its divisors is an integer number (1821204).

Almost surely, 2^90647808 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 90647808, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (131126688).

90647808 is an abundant number, since it is smaller than the sum of its proper divisors (171605568).

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

90647808 is a wasteful number, since it uses less digits than its factorization.

90647808 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 220 (or 206 counting only the distinct ones).

The product of its (nonzero) digits is 96768, while the sum is 42.

The square root of 90647808 is about 9520.9142418152. The cubic root of 90647808 is about 449.2131236243.

The spelling of 90647808 in words is "ninety million, six hundred forty-seven thousand, eight hundred eight".