64046440 has 16 divisors (see below), whose sum is σ = 144104580. Its totient is φ = 25618560.

The previous prime is 64046417. The next prime is 64046441. The reversal of 64046440 is 4464046.

It can be written as a sum of positive squares in 2 ways, for example, as 59197636 + 4848804 = 7694^2 + 2202^2 .

It is a junction number, because it is equal to n+sod(n) for n = 64046399 and 64046408.

It is not an unprimeable number, because it can be changed into a prime (64046441) 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, 800541 + ... + 800620.

Almost surely, 2^64046440 is an apocalyptic number.

It is an amenable number.

64046440 is an abundant number, since it is smaller than the sum of its proper divisors (80058140).

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

64046440 is a wasteful number, since it uses less digits than its factorization.

64046440 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1601172 (or 1601168 counting only the distinct ones).

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

The square root of 64046440 is about 8002.9019736593. The cubic root of 64046440 is about 400.0967266080.

The spelling of 64046440 in words is "sixty-four million, forty-six thousand, four hundred forty".