64244405 has 24 divisors (see below), whose sum is σ = 81702432. Its totient is φ = 48486944.

The previous prime is 64244393. The next prime is 64244419. The reversal of 64244405 is 50444246.

It is a happy number.

It is not a de Polignac number, because 64244405 - 2²⁰ = 63195829 is a prime.

It is a hoax number, since the sum of its digits (29) coincides with the sum of the digits of its distinct prime factors.

It is a Duffinian number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 282902 + ... + 283128.

It is an arithmetic number, because the mean of its divisors is an integer number (3404268).

Almost surely, 2^64244405 is an apocalyptic number.

It is an amenable number.

64244405 is a deficient number, since it is larger than the sum of its proper divisors (17458027).

64244405 is a wasteful number, since it uses less digits than its factorization.

64244405 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 385 (or 362 counting only the distinct ones).

The product of its (nonzero) digits is 15360, while the sum is 29.

The square root of 64244405 is about 8015.2607568313. The cubic root of 64244405 is about 400.5085303017.

The spelling of 64244405 in words is "sixty-four million, two hundred forty-four thousand, four hundred five".