64400446 has 8 divisors (see below), whose sum is σ = 105382584. Its totient is φ = 29272920.

The previous prime is 64400419. The next prime is 64400449.

64400446 is nontrivially palindromic in base 10.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (64400449) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1463625 + ... + 1463668.

It is an arithmetic number, because the mean of its divisors is an integer number (13172823).

Almost surely, 2^64400446 is an apocalyptic number.

64400446 is a deficient number, since it is larger than the sum of its proper divisors (40982138).

64400446 is a wasteful number, since it uses less digits than its factorization.

64400446 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2927306.

The product of its (nonzero) digits is 9216, while the sum is 28.

The square root of 64400446 is about 8024.9888473443. The cubic root of 64400446 is about 400.8325285384.

It can be divided in two parts, 64400 and 446, that added together give a palindrome (64846).

The spelling of 64400446 in words is "sixty-four million, four hundred thousand, four hundred forty-six".