6402888 has 80 divisors (see below), whose sum is σ = 18447660. Its totient is φ = 2073600.

The previous prime is 6402883. The next prime is 6402889. The reversal of 6402888 is 8882046.

6402888 is a `hidden beast` number, since 640 + 2 + 8 + 8 + 8 = 666.

It can be written as a sum of positive squares in 2 ways, for example, as 6260004 + 142884 = 2502^2 + 378^2 .

It is a Harshad number since it is a multiple of its sum of digits (36).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (6402883) by changing a digit.

It is a polite number, since it can be written in 19 ways as a sum of consecutive naturals, for example, 26448 + ... + 26688.

Almost surely, 2^6402888 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 6402888, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (9223830).

6402888 is an abundant number, since it is smaller than the sum of its proper divisors (12044772).

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

6402888 is a wasteful number, since it uses less digits than its factorization.

6402888 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 300 (or 287 counting only the distinct ones).

The product of its (nonzero) digits is 24576, while the sum is 36.

The square root of 6402888 is about 2530.3928548745. The cubic root of 6402888 is about 185.6914760377.

The spelling of 6402888 in words is "six million, four hundred two thousand, eight hundred eighty-eight".