902640 has 40 divisors (see below), whose sum is σ = 2798928. Its totient is φ = 240640.

The previous prime is 902639. The next prime is 902653. The reversal of 902640 is 46209.

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 pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1641 + ... + 2120.

2⁹⁰²⁶⁴⁰ is an apocalyptic number.

It is an amenable number.

902640 is an abundant number, since it is smaller than the sum of its proper divisors (1896288).

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

902640 is a wasteful number, since it uses less digits than its factorization.

902640 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3777 (or 3771 counting only the distinct ones).

The product of its (nonzero) digits is 432, while the sum is 21.

The square root of 902640 is about 950.0736813532. The cubic root of 902640 is about 96.6432497116.

Adding to 902640 its reverse (46209), we get a palindrome (948849).

The spelling of 902640 in words is "nine hundred two thousand, six hundred forty".