64448280 has 192 divisors, whose sum is σ = 231154560. Its totient is φ = 15473664.

The previous prime is 64448257. The next prime is 64448281. The reversal of 64448280 is 8284446.

64448280 is a `hidden beast` number, since 644 + 4 + 8 + 2 + 8 + 0 = 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 (64448281) by changing a digit.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 219814 + ... + 220106.

It is an arithmetic number, because the mean of its divisors is an integer number (1203930).

Almost surely, 2^64448280 is an apocalyptic number.

64448280 is a gapful number since it is divisible by the number (60) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 64448280, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (115577280).

64448280 is an abundant number, since it is smaller than the sum of its proper divisors (166706280).

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

64448280 is a wasteful number, since it uses less digits than its factorization.

64448280 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 370 (or 363 counting only the distinct ones).

The product of its (nonzero) digits is 49152, while the sum is 36.

The square root of 64448280 is about 8027.9686098041. The cubic root of 64448280 is about 400.9317446114.

The spelling of 64448280 in words is "sixty-four million, four hundred forty-eight thousand, two hundred eighty".