72427764 has 12 divisors (see below), whose sum is σ = 168998144. Its totient is φ = 24142584.

The previous prime is 72427763. The next prime is 72427793. The reversal of 72427764 is 46772427.

It is a tau number, because it is divible by the number of its divisors (12).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (72427763) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 3017812 + ... + 3017835.

Almost surely, 2^72427764 is an apocalyptic number.

It is an amenable number.

72427764 is an abundant number, since it is smaller than the sum of its proper divisors (96570380).

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

72427764 is a wasteful number, since it uses less digits than its factorization.

72427764 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6035654 (or 6035652 counting only the distinct ones).

The product of its digits is 131712, while the sum is 39.

The square root of 72427764 is about 8510.4502818594. The cubic root of 72427764 is about 416.8390133598.

The spelling of 72427764 in words is "seventy-two million, four hundred twenty-seven thousand, seven hundred sixty-four".