72937426 has 4 divisors (see below), whose sum is σ = 109406142. Its totient is φ = 36468712.

The previous prime is 72937399. The next prime is 72937433. The reversal of 72937426 is 62473927.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in only one way, i.e., 64786401 + 8151025 = 8049^2 + 2855^2 .

It is a super-2 number, since 2×72937426² = 10639736223010952, which contains 22 as substring.

It is a Smith number, since the sum of its digits (40) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 18234355 + ... + 18234358.

Almost surely, 2^72937426 is an apocalyptic number.

72937426 is a deficient number, since it is larger than the sum of its proper divisors (36468716).

72937426 is a wasteful number, since it uses less digits than its factorization.

72937426 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 36468715.

The product of its digits is 127008, while the sum is 40.

The square root of 72937426 is about 8540.3410938908. The cubic root of 72937426 is about 417.8144709034.

The spelling of 72937426 in words is "seventy-two million, nine hundred thirty-seven thousand, four hundred twenty-six".