72881426 has 4 divisors (see below), whose sum is σ = 109322142. Its totient is φ = 36440712.

The previous prime is 72881407. The next prime is 72881483. The reversal of 72881426 is 62418827.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 62418827 = 113 ⋅552379.

It can be written as a sum of positive squares in only one way, i.e., 68475625 + 4405801 = 8275^2 + 2099^2 .

It is a self number, because there is not a number n which added to its sum of digits gives 72881426.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 18220355 + ... + 18220358.

Almost surely, 2^72881426 is an apocalyptic number.

72881426 is a deficient number, since it is larger than the sum of its proper divisors (36440716).

72881426 is a wasteful number, since it uses less digits than its factorization.

72881426 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 36440715.

The product of its digits is 43008, while the sum is 38.

The square root of 72881426 is about 8537.0619067686. The cubic root of 72881426 is about 417.7075134638.

The spelling of 72881426 in words is "seventy-two million, eight hundred eighty-one thousand, four hundred twenty-six".