64733916 has 96 divisors (see below), whose sum is σ = 172872000. Its totient is φ = 18708480.

The previous prime is 64733897. The next prime is 64733917. The reversal of 64733916 is 61933746.

It is a Harshad number since it is a multiple of its sum of digits (39).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (64733917) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 185310 + ... + 185658.

It is an arithmetic number, because the mean of its divisors is an integer number (1800750).

Almost surely, 2^64733916 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 64733916, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (86436000).

64733916 is an abundant number, since it is smaller than the sum of its proper divisors (108138084).

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

64733916 is a wasteful number, since it uses less digits than its factorization.

64733916 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 439 (or 437 counting only the distinct ones).

The product of its digits is 81648, while the sum is 39.

The square root of 64733916 is about 8045.7389965124. The cubic root of 64733916 is about 401.5231840800.

The spelling of 64733916 in words is "sixty-four million, seven hundred thirty-three thousand, nine hundred sixteen".