64628280 has 192 divisors, whose sum is σ = 223423200. Its totient is φ = 16796160.

The previous prime is 64628231. The next prime is 64628293. The reversal of 64628280 is 8282646.

64628280 = T₂₅₁ + T₂₅₂ + ... + T₇₃₈.

64628280 is a `hidden beast` number, since 6 + 4 + 628 + 28 + 0 = 666.

64628280 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a Harshad number since it is a multiple of its sum of digits (36).

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 592866 + ... + 592974.

Almost surely, 2^64628280 is an apocalyptic number.

64628280 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 64628280, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (111711600).

64628280 is an abundant number, since it is smaller than the sum of its proper divisors (158794920).

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

64628280 is a wasteful number, since it uses less digits than its factorization.

64628280 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 196 (or 180 counting only the distinct ones).

The product of its (nonzero) digits is 36864, while the sum is 36.

The square root of 64628280 is about 8039.1715991139. The cubic root of 64628280 is about 401.3046567173.

The spelling of 64628280 in words is "sixty-four million, six hundred twenty-eight thousand, two hundred eighty".