902343640 has 64 divisors (see below), whose sum is σ = 2252448000. Its totient is φ = 322554240.

The previous prime is 902343623. The next prime is 902343641. The reversal of 902343640 is 46343209.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (902343641) 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, 8581 + ... + 43339.

It is an arithmetic number, because the mean of its divisors is an integer number (35194500).

Almost surely, 2^902343640 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 902343640, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1126224000).

902343640 is an abundant number, since it is smaller than the sum of its proper divisors (1350104360).

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

902343640 is a wasteful number, since it uses less digits than its factorization.

902343640 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 34840 (or 34836 counting only the distinct ones).

The product of its (nonzero) digits is 15552, while the sum is 31.

The square root of 902343640 is about 30039.0352707939. The cubic root of 902343640 is about 966.3267172979.

Adding to 902343640 its reverse (46343209), we get a palindrome (948686849).

The spelling of 902343640 in words is "nine hundred two million, three hundred forty-three thousand, six hundred forty".