64493712 has 80 divisors (see below), whose sum is σ = 186089280. Its totient is φ = 21385728.

The previous prime is 64493687. The next prime is 64493717. The reversal of 64493712 is 21739446.

64493712 is a `hidden beast` number, since 644 + 9 + 3 + 7 + 1 + 2 = 666.

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

It is not an unprimeable number, because it can be changed into a prime (64493717) 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, 145363 + ... + 145805.

It is an arithmetic number, because the mean of its divisors is an integer number (2326116).

Almost surely, 2^64493712 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 64493712, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (93044640).

64493712 is an abundant number, since it is smaller than the sum of its proper divisors (121595568).

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

64493712 is a wasteful number, since it uses less digits than its factorization.

64493712 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 797 (or 785 counting only the distinct ones).

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

The square root of 64493712 is about 8030.7977187824. The cubic root of 64493712 is about 401.0259330703.

The spelling of 64493712 in words is "sixty-four million, four hundred ninety-three thousand, seven hundred twelve".