64490448 has 80 divisors (see below), whose sum is σ = 184559616. Its totient is φ = 19240320.

The previous prime is 64490441. The next prime is 64490449. The reversal of 64490448 is 84409446.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (64490441) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 34465 + ... + 36287.

Almost surely, 2^64490448 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 64490448, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (92279808).

64490448 is an abundant number, since it is smaller than the sum of its proper divisors (120069168).

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

64490448 is a wasteful number, since it uses less digits than its factorization.

64490448 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1912 (or 1906 counting only the distinct ones).

The product of its (nonzero) digits is 110592, while the sum is 39.

The square root of 64490448 is about 8030.5944985412. The cubic root of 64490448 is about 401.0191677042.

The spelling of 64490448 in words is "sixty-four million, four hundred ninety thousand, four hundred forty-eight".