64311140 has 24 divisors (see below), whose sum is σ = 136368960. Its totient is φ = 25473888.

The previous prime is 64311113. The next prime is 64311157. The reversal of 64311140 is 4111346.

It is a Harshad number since it is a multiple of its sum of digits (20).

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 13550 + ... + 17669.

It is an arithmetic number, because the mean of its divisors is an integer number (5682040).

Almost surely, 2^64311140 is an apocalyptic number.

It is an amenable number.

64311140 is an abundant number, since it is smaller than the sum of its proper divisors (72057820).

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

64311140 is a wasteful number, since it uses less digits than its factorization.

64311140 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 31331 (or 31329 counting only the distinct ones).

The product of its (nonzero) digits is 288, while the sum is 20.

The square root of 64311140 is about 8019.4226724871. The cubic root of 64311140 is about 400.6471607261.

Adding to 64311140 its reverse (4111346), we get a palindrome (68422486).

The spelling of 64311140 in words is "sixty-four million, three hundred eleven thousand, one hundred forty".