64428318 has 32 divisors (see below), whose sum is σ = 143608320. Its totient is φ = 21411000.

The previous prime is 64428293. The next prime is 64428341. The reversal of 64428318 is 81382446.

64428318 is a `hidden beast` number, since 644 + 2 + 8 + 3 + 1 + 8 = 666.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 18193 + ... + 21443.

It is an arithmetic number, because the mean of its divisors is an integer number (4487760).

Almost surely, 2^64428318 is an apocalyptic number.

64428318 is an abundant number, since it is smaller than the sum of its proper divisors (79180002).

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

64428318 is a wasteful number, since it uses less digits than its factorization.

64428318 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3629 (or 3623 counting only the distinct ones).

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

The square root of 64428318 is about 8026.7252351130. The cubic root of 64428318 is about 400.8903459067.

It can be divided in two parts, 64428 and 318, that added together give a palindrome (64746).

The spelling of 64428318 in words is "sixty-four million, four hundred twenty-eight thousand, three hundred eighteen".