64436379 has 32 divisors (see below), whose sum is σ = 102176256. Its totient is φ = 35354880.

The previous prime is 64436377. The next prime is 64436413. The reversal of 64436379 is 97363446.

It is not a de Polignac number, because 64436379 - 2¹ = 64436377 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 64436379.

It is not an unprimeable number, because it can be changed into a prime (64436377) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 57129 + ... + 58245.

It is an arithmetic number, because the mean of its divisors is an integer number (3193008).

Almost surely, 2^64436379 is an apocalyptic number.

64436379 is a deficient number, since it is larger than the sum of its proper divisors (37739877).

64436379 is a wasteful number, since it uses less digits than its factorization.

64436379 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1235.

The product of its digits is 326592, while the sum is 42.

The square root of 64436379 is about 8027.2273544481. The cubic root of 64436379 is about 400.9070644471.

The spelling of 64436379 in words is "sixty-four million, four hundred thirty-six thousand, three hundred seventy-nine".