64719072 has 144 divisors (see below), whose sum is σ = 207567360. Its totient is φ = 18950400.

The previous prime is 64719071. The next prime is 64719107. The reversal of 64719072 is 27091746.

It is a happy number.

64719072 is a `hidden beast` number, since 647 + 1 + 9 + 0 + 7 + 2 = 666.

64719072 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a tau number, because it is divible by the number of its divisors (144).

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 (64719071) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 97879 + ... + 98537.

It is an arithmetic number, because the mean of its divisors is an integer number (1441440).

Almost surely, 2^64719072 is an apocalyptic number.

64719072 is a gapful number since it is divisible by the number (62) 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 64719072, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (103783680).

64719072 is an abundant number, since it is smaller than the sum of its proper divisors (142848288).

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

64719072 is a wasteful number, since it uses less digits than its factorization.

64719072 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 717 (or 706 counting only the distinct ones).

The product of its (nonzero) digits is 21168, while the sum is 36.

The square root of 64719072 is about 8044.8164677636. The cubic root of 64719072 is about 401.4924909176.

The spelling of 64719072 in words is "sixty-four million, seven hundred nineteen thousand, seventy-two".