64340072 has 8 divisors (see below), whose sum is σ = 120637650. Its totient is φ = 32170032.

The previous prime is 64340071. The next prime is 64340093. The reversal of 64340072 is 27004346.

It is a happy number.

It can be written as a sum of positive squares in only one way, i.e., 64096036 + 244036 = 8006^2 + 494^2 .

It is a tau number, because it is divible by the number of its divisors (8).

It is not an unprimeable number, because it can be changed into a prime (64340071) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 4021247 + ... + 4021262.

Almost surely, 2^64340072 is an apocalyptic number.

It is an amenable number.

64340072 is a deficient number, since it is larger than the sum of its proper divisors (56297578).

64340072 is a wasteful number, since it uses less digits than its factorization.

64340072 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 8042515 (or 8042511 counting only the distinct ones).

The product of its (nonzero) digits is 4032, while the sum is 26.

The square root of 64340072 is about 8021.2263401552. The cubic root of 64340072 is about 400.7072321531.

The spelling of 64340072 in words is "sixty-four million, three hundred forty thousand, seventy-two".