6408870840 has 48 divisors (see below), whose sum is σ = 20828831400. Its totient is φ = 1709032128.

The previous prime is 6408870833. The next prime is 6408870847. The reversal of 6408870840 is 480788046.

It is an interprime number because it is at equal distance from previous prime (6408870833) and next prime (6408870847).

It is a Harshad number since it is a multiple of its sum of digits (45).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (6408870847) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 8900850 + ... + 8901569.

Almost surely, 2^6408870840 is an apocalyptic number.

6408870840 is a gapful number since it is divisible by the number (60) formed by its first and last digit.

It is an amenable number.

6408870840 is an abundant number, since it is smaller than the sum of its proper divisors (14419960560).

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

6408870840 is a wasteful number, since it uses less digits than its factorization.

6408870840 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 17802436 (or 17802429 counting only the distinct ones).

The product of its (nonzero) digits is 344064, while the sum is 45.

The square root of 6408870840 is about 80055.4235514372. The cubic root of 6408870840 is about 1857.4929455873.

The spelling of 6408870840 in words is "six billion, four hundred eight million, eight hundred seventy thousand, eight hundred forty".