90880647 has 32 divisors (see below), whose sum is σ = 143001600. Its totient is φ = 50613120.

The previous prime is 90880619. The next prime is 90880649. The reversal of 90880647 is 74608809.

It is a happy number.

It is not a de Polignac number, because 90880647 - 2⁶ = 90880583 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 90880599 and 90880608.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (90880649) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 149418 + ... + 150024.

It is an arithmetic number, because the mean of its divisors is an integer number (4468800).

Almost surely, 2^90880647 is an apocalyptic number.

90880647 is a deficient number, since it is larger than the sum of its proper divisors (52120953).

90880647 is a wasteful number, since it uses less digits than its factorization.

90880647 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 983.

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

The square root of 90880647 is about 9533.1341645862. The cubic root of 90880647 is about 449.5974127770.

The spelling of 90880647 in words is "ninety million, eight hundred eighty thousand, six hundred forty-seven".