6405264 has 40 divisors (see below), whose sum is σ = 18386720. Its totient is φ = 2134944.

The previous prime is 6405263. The next prime is 6405271. The reversal of 6405264 is 4625046.

It is a happy number.

It is a hoax number, since the sum of its digits (27) coincides with the sum of the digits of its distinct prime factors.

It is a Harshad number since it is a multiple of its sum of digits (27).

It is not an unprimeable number, because it can be changed into a prime (6405263) 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, 6982 + ... + 7845.

It is an arithmetic number, because the mean of its divisors is an integer number (459668).

Almost surely, 2^6405264 is an apocalyptic number.

It is an amenable number.

6405264 is an abundant number, since it is smaller than the sum of its proper divisors (11981456).

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

6405264 is a wasteful number, since it uses less digits than its factorization.

6405264 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 14844 (or 14832 counting only the distinct ones).

The product of its (nonzero) digits is 5760, while the sum is 27.

The square root of 6405264 is about 2530.8623036428. The cubic root of 6405264 is about 185.7144421526.

Adding to 6405264 its product of nonzero digits (5760), we get a square (6411024 = 2532²).

The spelling of 6405264 in words is "six million, four hundred five thousand, two hundred sixty-four".