6440267724 has 48 divisors (see below), whose sum is σ = 16774665600. Its totient is φ = 1906208640.

The previous prime is 6440267723. The next prime is 6440267747. The reversal of 6440267724 is 4277620446.

It is a happy number.

It is a super-2 number, since 2×6440267724² = 82954096713592280352, which contains 22 as substring.

It is a hoax number, since the sum of its digits (42) coincides with the sum of the digits of its distinct prime factors.

It is not an unprimeable number, because it can be changed into a prime (6440267723) 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, 561649 + ... + 573000.

It is an arithmetic number, because the mean of its divisors is an integer number (349472200).

Almost surely, 2^6440267724 is an apocalyptic number.

It is an amenable number.

6440267724 is an abundant number, since it is smaller than the sum of its proper divisors (10334397876).

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

6440267724 is a wasteful number, since it uses less digits than its factorization.

6440267724 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1134710 (or 1134708 counting only the distinct ones).

The product of its (nonzero) digits is 451584, while the sum is 42.

The square root of 6440267724 is about 80251.2786440191. The cubic root of 6440267724 is about 1860.5212748698.

The spelling of 6440267724 in words is "six billion, four hundred forty million, two hundred sixty-seven thousand, seven hundred twenty-four".