64799280 has 480 divisors, whose sum is σ = 285981696. Its totient is φ = 12773376.

The previous prime is 64799249. The next prime is 64799299. The reversal of 64799280 is 8299746.

It is a happy number.

It is a Harshad number since it is a multiple of its sum of digits (45).

It is an unprimeable number.

It is a polite number, since it can be written in 95 ways as a sum of consecutive naturals, for example, 1506939 + ... + 1506981.

Almost surely, 2^64799280 is an apocalyptic number.

64799280 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 64799280, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (142990848).

64799280 is an abundant number, since it is smaller than the sum of its proper divisors (221182416).

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

64799280 is a wasteful number, since it uses less digits than its factorization.

64799280 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 105 (or 96 counting only the distinct ones).

The product of its (nonzero) digits is 217728, while the sum is 45.

The square root of 64799280 is about 8049.7999975155. The cubic root of 64799280 is about 401.6582824150.

The spelling of 64799280 in words is "sixty-four million, seven hundred ninety-nine thousand, two hundred eighty".