64307144 has 48 divisors (see below), whose sum is σ = 136872960. Its totient is φ = 28274400.

The previous prime is 64307143. The next prime is 64307171. The reversal of 64307144 is 44170346.

It is not an unprimeable number, because it can be changed into a prime (64307143) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 28937 + ... + 31079.

It is an arithmetic number, because the mean of its divisors is an integer number (2851520).

Almost surely, 2^64307144 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 64307144, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (68436480).

64307144 is an abundant number, since it is smaller than the sum of its proper divisors (72565816).

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

64307144 is a wasteful number, since it uses less digits than its factorization.

64307144 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2202 (or 2187 counting only the distinct ones).

The product of its (nonzero) digits is 8064, while the sum is 29.

The square root of 64307144 is about 8019.1735234998. The cubic root of 64307144 is about 400.6388624271.

The spelling of 64307144 in words is "sixty-four million, three hundred seven thousand, one hundred forty-four".