64329140 has 12 divisors (see below), whose sum is σ = 135091236. Its totient is φ = 25731648.

The previous prime is 64329131. The next prime is 64329143. The reversal of 64329140 is 4192346.

It can be written as a sum of positive squares in 2 ways, for example, as 28281124 + 36048016 = 5318^2 + 6004^2 .

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (64329143) 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, 1608209 + ... + 1608248.

It is an arithmetic number, because the mean of its divisors is an integer number (11257603).

Almost surely, 2^64329140 is an apocalyptic number.

It is an amenable number.

64329140 is an abundant number, since it is smaller than the sum of its proper divisors (70762096).

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

64329140 is a wasteful number, since it uses less digits than its factorization.

64329140 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3216466 (or 3216464 counting only the distinct ones).

The product of its (nonzero) digits is 5184, while the sum is 29.

The square root of 64329140 is about 8020.5448692717. The cubic root of 64329140 is about 400.6845361906.

The spelling of 64329140 in words is "sixty-four million, three hundred twenty-nine thousand, one hundred forty".