900408280 has 32 divisors (see below), whose sum is σ = 2053677600. Its totient is φ = 355228416.

The previous prime is 900408253. The next prime is 900408287. The reversal of 900408280 is 82804009.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (900408287) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 151260 + ... + 157099.

It is an arithmetic number, because the mean of its divisors is an integer number (64177425).

Almost surely, 2^900408280 is an apocalyptic number.

It is an amenable number.

900408280 is an abundant number, since it is smaller than the sum of its proper divisors (1153269320).

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

900408280 is a wasteful number, since it uses less digits than its factorization.

900408280 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 308443 (or 308439 counting only the distinct ones).

The product of its (nonzero) digits is 4608, while the sum is 31.

The square root of 900408280 is about 30006.8038951169. The cubic root of 900408280 is about 965.6353588329.

The spelling of 900408280 in words is "nine hundred million, four hundred eight thousand, two hundred eighty".