900210640 has 40 divisors (see below), whose sum is σ = 2391989760. Its totient is φ = 308643456.

The previous prime is 900210631. The next prime is 900210653. The reversal of 900210640 is 46012009.

900210640 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a tau number, because it is divible by the number of its divisors (40).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 803200 + ... + 804319.

It is an arithmetic number, because the mean of its divisors is an integer number (59799744).

Almost surely, 2^900210640 is an apocalyptic number.

It is an amenable number.

900210640 is an abundant number, since it is smaller than the sum of its proper divisors (1491779120).

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

900210640 is a wasteful number, since it uses less digits than its factorization.

900210640 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1607539 (or 1607533 counting only the distinct ones).

The product of its (nonzero) digits is 432, while the sum is 22.

The square root of 900210640 is about 30003.5104612777. The cubic root of 900210640 is about 965.5647012057.

Adding to 900210640 its reverse (46012009), we get a palindrome (946222649).

The spelling of 900210640 in words is "nine hundred million, two hundred ten thousand, six hundred forty".