6402905920 has 112 divisors (see below), whose sum is σ = 15690299328. Its totient is φ = 2487767040.

The previous prime is 6402905903. The next prime is 6402905921. The reversal of 6402905920 is 295092046.

It is a self number, because there is not a number n which added to its sum of digits gives 6402905920.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (6402905921) 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, 1563075 + ... + 1567165.

Almost surely, 2^6402905920 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 6402905920, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (7845149664).

6402905920 is an abundant number, since it is smaller than the sum of its proper divisors (9287393408).

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

6402905920 is a wasteful number, since it uses less digits than its factorization.

6402905920 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4248 (or 4238 counting only the distinct ones).

The product of its (nonzero) digits is 38880, while the sum is 37.

The square root of 6402905920 is about 80018.1599388539. The cubic root of 6402905920 is about 1856.9164927142.

Adding to 6402905920 its reverse (295092046), we get a palindrome (6697997966).

The spelling of 6402905920 in words is "six billion, four hundred two million, nine hundred five thousand, nine hundred twenty".