900660640 has 96 divisors (see below), whose sum is σ = 2337310080. Its totient is φ = 325248000.

The previous prime is 900660637. The next prime is 900660721. The reversal of 900660640 is 46066009.

It is a super-2 number, since 2×900660640² = 1622379176890419200, which contains 22 as substring.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 264066 + ... + 267454.

It is an arithmetic number, because the mean of its divisors is an integer number (24346980).

Almost surely, 2^900660640 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 900660640, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1168655040).

900660640 is an abundant number, since it is smaller than the sum of its proper divisors (1436649440).

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

900660640 is a wasteful number, since it uses less digits than its factorization.

900660640 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3566 (or 3558 counting only the distinct ones).

The product of its (nonzero) digits is 7776, while the sum is 31.

The square root of 900660640 is about 30011.0086468283. The cubic root of 900660640 is about 965.7255641993.

The spelling of 900660640 in words is "nine hundred million, six hundred sixty thousand, six hundred forty".