72426512 has 40 divisors (see below), whose sum is σ = 144797280. Its totient is φ = 35078400.

The previous prime is 72426503. The next prime is 72426527. The reversal of 72426512 is 21562427.

It is a happy number.

It is a super-2 number, since 2×72426512² = 10491199280972288, which contains 22 as substring.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (7) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 68387 + ... + 69437.

It is an arithmetic number, because the mean of its divisors is an integer number (3619932).

Almost surely, 2^72426512 is an apocalyptic number.

It is an amenable number.

72426512 is a deficient number, since it is larger than the sum of its proper divisors (72370768).

72426512 is a wasteful number, since it uses less digits than its factorization.

72426512 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1191 (or 1185 counting only the distinct ones).

The product of its digits is 6720, while the sum is 29.

The square root of 72426512 is about 8510.3767249165. The cubic root of 72426512 is about 416.8366114934.

Adding to 72426512 its reverse (21562427), we get a palindrome (93988939).

The spelling of 72426512 in words is "seventy-two million, four hundred twenty-six thousand, five hundred twelve".