64678860 has 36 divisors (see below), whose sum is σ = 196193088. Its totient is φ = 17247648.

The previous prime is 64678847. The next prime is 64678879. The reversal of 64678860 is 6887646.

It is a happy number.

It is a tau number, because it is divible by the number of its divisors (36).

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

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 179484 + ... + 179843.

It is an arithmetic number, because the mean of its divisors is an integer number (5449808).

Almost surely, 2^64678860 is an apocalyptic number.

64678860 is a gapful number since it is divisible by the number (60) formed by its first and last digit.

It is an amenable number.

64678860 is an abundant number, since it is smaller than the sum of its proper divisors (131514228).

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

64678860 is a wasteful number, since it uses less digits than its factorization.

64678860 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 359342 (or 359337 counting only the distinct ones).

The product of its (nonzero) digits is 387072, while the sum is 45.

The square root of 64678860 is about 8042.3168303667. The cubic root of 64678860 is about 401.4093203753.

The spelling of 64678860 in words is "sixty-four million, six hundred seventy-eight thousand, eight hundred sixty".