64916280 has 288 divisors, whose sum is σ = 251793360. Its totient is φ = 14376960.

The previous prime is 64916279. The next prime is 64916287. The reversal of 64916280 is 8261946.

64916280 is a `hidden beast` number, since 649 + 1 + 6 + 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 (64916287) by changing a digit.

It is a polite number, since it can be written in 71 ways as a sum of consecutive naturals, for example, 669192 + ... + 669288.

Almost surely, 2^64916280 is an apocalyptic number.

64916280 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 64916280, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (125896680).

64916280 is an abundant number, since it is smaller than the sum of its proper divisors (186877080).

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

64916280 is a wasteful number, since it uses less digits than its factorization.

64916280 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 151 (or 131 counting only the distinct ones).

The product of its (nonzero) digits is 20736, while the sum is 36.

The square root of 64916280 is about 8057.0639813768. The cubic root of 64916280 is about 401.8998785337.

The spelling of 64916280 in words is "sixty-four million, nine hundred sixteen thousand, two hundred eighty".