64865280 has 176 divisors, whose sum is σ = 214591104. Its totient is φ = 16711680.

The previous prime is 64865233. The next prime is 64865287. The reversal of 64865280 is 8256846.

It is not an unprimeable number, because it can be changed into a prime (64865287) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 629709 + ... + 629811.

Almost surely, 2^64865280 is an apocalyptic number.

64865280 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 64865280, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (107295552).

64865280 is an abundant number, since it is smaller than the sum of its proper divisors (149725824).

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

64865280 is a wasteful number, since it uses less digits than its factorization.

64865280 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 172 (or 154 counting only the distinct ones).

The product of its (nonzero) digits is 92160, while the sum is 39.

The square root of 64865280 is about 8053.8984349196. The cubic root of 64865280 is about 401.7946031247.

The spelling of 64865280 in words is "sixty-four million, eight hundred sixty-five thousand, two hundred eighty".