6406344252 has 144 divisors (see below), whose sum is σ = 20249978112. Its totient is φ = 1659018240.

The previous prime is 6406344239. The next prime is 6406344253. The reversal of 6406344252 is 2524436046.

6406344252 is a `hidden beast` number, since 64 + 0 + 6 + 344 + 252 = 666.

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 (6406344253) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 975243 + ... + 981789.

It is an arithmetic number, because the mean of its divisors is an integer number (140624848).

Almost surely, 2^6406344252 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 6406344252, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (10124989056).

6406344252 is an abundant number, since it is smaller than the sum of its proper divisors (13843633860).

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

6406344252 is a wasteful number, since it uses less digits than its factorization.

6406344252 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6928 (or 6923 counting only the distinct ones).

The product of its (nonzero) digits is 138240, while the sum is 36.

The square root of 6406344252 is about 80039.6417533212. The cubic root of 6406344252 is about 1857.2488185346.

The spelling of 6406344252 in words is "six billion, four hundred six million, three hundred forty-four thousand, two hundred fifty-two".