90380280 has 64 divisors (see below), whose sum is σ = 271936800. Its totient is φ = 24030720.

The previous prime is 90380243. The next prime is 90380287. The reversal of 90380280 is 8208309.

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

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (90380287) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 49626 + ... + 51414.

Almost surely, 2^90380280 is an apocalyptic number.

It is an amenable number.

90380280 is an abundant number, since it is smaller than the sum of its proper divisors (181556520).

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

90380280 is a wasteful number, since it uses less digits than its factorization.

90380280 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2224 (or 2220 counting only the distinct ones).

The product of its (nonzero) digits is 3456, while the sum is 30.

The square root of 90380280 is about 9506.8543693485. The cubic root of 90380280 is about 448.7707687152.

Adding to 90380280 its reverse (8208309), we get a palindrome (98588589).

The spelling of 90380280 in words is "ninety million, three hundred eighty thousand, two hundred eighty".