64464442 has 16 divisors (see below), whose sum is σ = 117011520. Its totient is φ = 26002368.

The previous prime is 64464431. The next prime is 64464443. The reversal of 64464442 is 24446446.

It is a Harshad number since it is a multiple of its sum of digits (34).

It is a junction number, because it is equal to n+sod(n) for n = 64464398 and 64464407.

It is not an unprimeable number, because it can be changed into a prime (64464443) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 135192 + ... + 135667.

It is an arithmetic number, because the mean of its divisors is an integer number (7313220).

Almost surely, 2^64464442 is an apocalyptic number.

64464442 is a deficient number, since it is larger than the sum of its proper divisors (52547078).

64464442 is a wasteful number, since it uses less digits than its factorization.

64464442 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 270885.

The product of its digits is 73728, while the sum is 34.

The square root of 64464442 is about 8028.9751525335. The cubic root of 64464442 is about 400.9652563269.

It can be divided in two parts, 6446444 and 2, that added together give a palindrome (6446446).

The spelling of 64464442 in words is "sixty-four million, four hundred sixty-four thousand, four hundred forty-two".