6344797440 has 72 divisors (see below), whose sum is σ = 20263709088. Its totient is φ = 1691944960.

The previous prime is 6344797397. The next prime is 6344797441. The reversal of 6344797440 is 447974436.

It is a Harshad number since it is a multiple of its sum of digits (48).

It is a self number, because there is not a number n which added to its sum of digits gives 6344797440.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (6344797441) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 822306 + ... + 829985.

It is an arithmetic number, because the mean of its divisors is an integer number (281440404).

Almost surely, 2^6344797440 is an apocalyptic number.

6344797440 is a gapful number since it is divisible by the number (60) formed by its first and last digit.

It is an amenable number.

6344797440 is an abundant number, since it is smaller than the sum of its proper divisors (13918911648).

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

6344797440 is a wasteful number, since it uses less digits than its factorization.

6344797440 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1652315 (or 1652301 counting only the distinct ones).

The product of its (nonzero) digits is 2032128, while the sum is 48.

The square root of 6344797440 is about 79654.2367988044. The cubic root of 6344797440 is about 1851.2820370886.

The spelling of 6344797440 in words is "six billion, three hundred forty-four million, seven hundred ninety-seven thousand, four hundred forty".