64247144 has 16 divisors (see below), whose sum is σ = 129730020. Its totient is φ = 29652480.

The previous prime is 64247143. The next prime is 64247201. The reversal of 64247144 is 44174246.

64247144 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It can be written as a sum of positive squares in 2 ways, for example, as 63840100 + 407044 = 7990^2 + 638^2 .

It is a self number, because there is not a number n which added to its sum of digits gives 64247144.

It is not an unprimeable number, because it can be changed into a prime (64247143) by changing a digit.

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 3 ways as a sum of consecutive naturals, for example, 308777 + ... + 308984.

Almost surely, 2^64247144 is an apocalyptic number.

It is an amenable number.

64247144 is an abundant number, since it is smaller than the sum of its proper divisors (65482876).

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

64247144 is a wasteful number, since it uses less digits than its factorization.

64247144 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 617780 (or 617776 counting only the distinct ones).

The product of its digits is 21504, while the sum is 32.

The square root of 64247144 is about 8015.4316165756. The cubic root of 64247144 is about 400.5142219894.

The spelling of 64247144 in words is "sixty-four million, two hundred forty-seven thousand, one hundred forty-four".