72422428 has 24 divisors (see below), whose sum is σ = 137078480. Its totient is φ = 33281280.

The previous prime is 72422419. The next prime is 72422461. The reversal of 72422428 is 82422427.

It is a self number, because there is not a number n which added to its sum of digits gives 72422428.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 9643 + ... + 15421.

Almost surely, 2^72422428 is an apocalyptic number.

It is an amenable number.

72422428 is a deficient number, since it is larger than the sum of its proper divisors (64656052).

72422428 is a wasteful number, since it uses less digits than its factorization.

72422428 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6037 (or 6035 counting only the distinct ones).

The product of its digits is 14336, while the sum is 31.

The square root of 72422428 is about 8510.1367791593. The cubic root of 72422428 is about 416.8287764586.

Subtracting 72422428 from its reverse (82422427), we obtain a palindrome (9999999).

It can be divided in two parts, 72 and 422428, that added together give a square (422500 = 650²).

The spelling of 72422428 in words is "seventy-two million, four hundred twenty-two thousand, four hundred twenty-eight".