64749312 has 108 divisors (see below), whose sum is σ = 188926920. Its totient is φ = 21325824.

The previous prime is 64749287. The next prime is 64749313. The reversal of 64749312 is 21394746.

64749312 is a `hidden beast` number, since 647 + 4 + 9 + 3 + 1 + 2 = 666.

It is a Harshad number since it is a multiple of its sum of digits (36).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (64749313) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 361639 + ... + 361817.

Almost surely, 2^64749312 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 64749312, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (94463460).

64749312 is an abundant number, since it is smaller than the sum of its proper divisors (124177608).

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

64749312 is a wasteful number, since it uses less digits than its factorization.

64749312 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 358 (or 341 counting only the distinct ones).

The product of its digits is 36288, while the sum is 36.

The square root of 64749312 is about 8046.6957193621. The cubic root of 64749312 is about 401.5550136643. Note that the first 3 decimals are identical.

The spelling of 64749312 in words is "sixty-four million, seven hundred forty-nine thousand, three hundred twelve".