64388016 has 120 divisors (see below), whose sum is σ = 224699904. Its totient is φ = 16721280.

The previous prime is 64388011. The next prime is 64388039. The reversal of 64388016 is 61088346.

It is a happy number.

64388016 is a `hidden beast` number, since 643 + 8 + 8 + 0 + 1 + 6 = 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 (64388011) 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, 8185 + ... + 13991.

Almost surely, 2^64388016 is an apocalyptic number.

64388016 is a gapful number since it is divisible by the number (66) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 64388016, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (112349952).

64388016 is an abundant number, since it is smaller than the sum of its proper divisors (160311888).

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

64388016 is a wasteful number, since it uses less digits than its factorization.

64388016 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5839 (or 5830 counting only the distinct ones).

The product of its (nonzero) digits is 27648, while the sum is 36.

The square root of 64388016 is about 8024.2143540661. The cubic root of 64388016 is about 400.8067385053.

The spelling of 64388016 in words is "sixty-four million, three hundred eighty-eight thousand, sixteen".