64995732 has 72 divisors (see below), whose sum is σ = 174283200. Its totient is φ = 20366208.

The previous prime is 64995731. The next prime is 64995767. The reversal of 64995732 is 23759946.

It is a happy number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (64995731) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 113944 + ... + 114512.

It is an arithmetic number, because the mean of its divisors is an integer number (2420600).

Almost surely, 2^64995732 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 64995732, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (87141600).

64995732 is an abundant number, since it is smaller than the sum of its proper divisors (109287468).

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

64995732 is a wasteful number, since it uses less digits than its factorization.

64995732 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 765 (or 760 counting only the distinct ones).

The product of its digits is 408240, while the sum is 45.

The square root of 64995732 is about 8061.9930538298. The cubic root of 64995732 is about 402.0637754317.

The spelling of 64995732 in words is "sixty-four million, nine hundred ninety-five thousand, seven hundred thirty-two".