64489572 has 72 divisors (see below), whose sum is σ = 196123200. Its totient is φ = 17454528.

The previous prime is 64489571. The next prime is 64489613. The reversal of 64489572 is 27598446.

It is a happy number.

It is a hoax number, since the sum of its digits (45) coincides with the sum of the digits of its distinct prime factors.

It is not an unprimeable number, because it can be changed into a prime (64489571) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 1947 + ... + 11522.

Almost surely, 2^64489572 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 64489572, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (98061600).

64489572 is an abundant number, since it is smaller than the sum of its proper divisors (131633628).

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

64489572 is a wasteful number, since it uses less digits than its factorization.

64489572 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 13505 (or 13500 counting only the distinct ones).

The product of its digits is 483840, while the sum is 45.

The square root of 64489572 is about 8030.5399569394. The cubic root of 64489572 is about 401.0173519605.

The spelling of 64489572 in words is "sixty-four million, four hundred eighty-nine thousand, five hundred seventy-two".