64449504 has 108 divisors (see below), whose sum is σ = 213247944. Its totient is φ = 18410112.

The previous prime is 64449493. The next prime is 64449509. The reversal of 64449504 is 40594446.

64449504 is a `hidden beast` number, since 644 + 4 + 9 + 5 + 0 + 4 = 666.

It is a Harshad number since it is a multiple of its sum of digits (36).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (64449509) by changing a digit.

It is a polite number, since it can be written in 17 ways as a sum of consecutive naturals, for example, 11829 + ... + 16395.

It is an arithmetic number, because the mean of its divisors is an integer number (1974518).

Almost surely, 2^64449504 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 64449504, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (106623972).

64449504 is an abundant number, since it is smaller than the sum of its proper divisors (148798440).

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

64449504 is a wasteful number, since it uses less digits than its factorization.

64449504 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4597 (or 4579 counting only the distinct ones).

The product of its (nonzero) digits is 69120, while the sum is 36.

The square root of 64449504 is about 8028.0448429241. The cubic root of 64449504 is about 400.9342827570.

The spelling of 64449504 in words is "sixty-four million, four hundred forty-nine thousand, five hundred four".