64444446 has 24 divisors (see below), whose sum is σ = 152323704. Its totient is φ = 19528560.

The previous prime is 64444441. The next prime is 64444451.

64444446 is a `hidden beast` number, since 644 + 4 + 4 + 4 + 4 + 6 = 666.

64444446 is nontrivially palindromic in base 10.

It is an interprime number because it is at equal distance from previous prime (64444441) and next prime (64444451).

It is a self number, because there is not a number n which added to its sum of digits gives 64444446.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (64444441) 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, 162541 + ... + 162936.

It is an arithmetic number, because the mean of its divisors is an integer number (6346821).

Almost surely, 2^64444446 is an apocalyptic number.

64444446 is a gapful number since it is divisible by the number (66) formed by its first and last digit.

64444446 is an abundant number, since it is smaller than the sum of its proper divisors (87879258).

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

64444446 is a wasteful number, since it uses less digits than its factorization.

64444446 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 325496 (or 325493 counting only the distinct ones).

The product of its digits is 147456, while the sum is 36.

The square root of 64444446 is about 8027.7298160813. The cubic root of 64444446 is about 400.9237940357.

The spelling of 64444446 in words is "sixty-four million, four hundred forty-four thousand, four hundred forty-six".