64321140 has 48 divisors (see below), whose sum is σ = 193955328. Its totient is φ = 15832704.

The previous prime is 64321079. The next prime is 64321141. The reversal of 64321140 is 4112346.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (64321141) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 40452 + ... + 42011.

It is an arithmetic number, because the mean of its divisors is an integer number (4040736).

Almost surely, 2^64321140 is an apocalyptic number.

64321140 is a gapful number since it is divisible by the number (60) formed by its first and last digit.

It is an amenable number.

64321140 is an abundant number, since it is smaller than the sum of its proper divisors (129634188).

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

64321140 is a wasteful number, since it uses less digits than its factorization.

64321140 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 82488 (or 82486 counting only the distinct ones).

The product of its (nonzero) digits is 576, while the sum is 21.

The square root of 64321140 is about 8020.0461345306. The cubic root of 64321140 is about 400.6679257339.

Adding to 64321140 its reverse (4112346), we get a palindrome (68433486).

The spelling of 64321140 in words is "sixty-four million, three hundred twenty-one thousand, one hundred forty".