6464538 has 24 divisors (see below), whose sum is σ = 14178528. Its totient is φ = 2128392.

The previous prime is 6464537. The next prime is 6464551. The reversal of 6464538 is 8354646.

6464538 is a `hidden beast` number, since 6 + 4 + 645 + 3 + 8 = 666.

It is a d-powerful number, because it can be written as 6² + 4⁴ + 6⁸ + 4⁵ + 5³ + 3¹⁴ + 8³ .

It is not an unprimeable number, because it can be changed into a prime (6464531) 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, 670 + ... + 3657.

It is an arithmetic number, because the mean of its divisors is an integer number (590772).

Almost surely, 2^6464538 is an apocalyptic number.

6464538 is an abundant number, since it is smaller than the sum of its proper divisors (7713990).

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

6464538 is a wasteful number, since it uses less digits than its factorization.

6464538 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4418 (or 4415 counting only the distinct ones).

The product of its digits is 69120, while the sum is 36.

The square root of 6464538 is about 2542.5455748128. The cubic root of 6464538 is about 186.2855482198.

It can be divided in two parts, 646 and 4538, that added together give a square (5184 = 72²).

The spelling of 6464538 in words is "six million, four hundred sixty-four thousand, five hundred thirty-eight".