90623280 has 80 divisors (see below), whose sum is σ = 306480384. Its totient is φ = 21968640.

The previous prime is 90623257. The next prime is 90623287. The reversal of 90623280 is 8232609.

It is a tau number, because it is divible by the number of its divisors (80).

It is a Harshad number since it is a multiple of its sum of digits (30).

It is not an unprimeable number, because it can be changed into a prime (90623287) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 14524 + ... + 19803.

Almost surely, 2^90623280 is an apocalyptic number.

It is an amenable number.

90623280 is an abundant number, since it is smaller than the sum of its proper divisors (215857104).

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

90623280 is a wasteful number, since it uses less digits than its factorization.

90623280 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 34354 (or 34348 counting only the distinct ones).

The product of its (nonzero) digits is 5184, while the sum is 30.

The square root of 90623280 is about 9519.6260430754. The cubic root of 90623280 is about 449.1726030877.

Adding to 90623280 its reverse (8232609), we get a palindrome (98855889).

The spelling of 90623280 in words is "ninety million, six hundred twenty-three thousand, two hundred eighty".