64401284 has 12 divisors (see below), whose sum is σ = 112994700. Its totient is φ = 32117088.

The previous prime is 64401269. The next prime is 64401289. The reversal of 64401284 is 48210446.

It can be written as a sum of positive squares in 2 ways, for example, as 29920900 + 34480384 = 5470^2 + 5872^2 .

It is not an unprimeable number, because it can be changed into a prime (64401289) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 19139 + ... + 22250.

It is an arithmetic number, because the mean of its divisors is an integer number (9416225).

Almost surely, 2^64401284 is an apocalyptic number.

It is an amenable number.

64401284 is a deficient number, since it is larger than the sum of its proper divisors (48593416).

64401284 is a wasteful number, since it uses less digits than its factorization.

64401284 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 41782 (or 41780 counting only the distinct ones).

The product of its (nonzero) digits is 6144, while the sum is 29.

The square root of 64401284 is about 8025.0410590850. The cubic root of 64401284 is about 400.8342671196.

The spelling of 64401284 in words is "sixty-four million, four hundred one thousand, two hundred eighty-four".