72996426 has 12 divisors (see below), whose sum is σ = 158158962. Its totient is φ = 24332136.

The previous prime is 72996421. The next prime is 72996431. The reversal of 72996426 is 62469927.

It is an interprime number because it is at equal distance from previous prime (72996421) and next prime (72996431).

It can be written as a sum of positive squares in only one way, i.e., 40335201 + 32661225 = 6351^2 + 5715^2 .

It is not an unprimeable number, because it can be changed into a prime (72996421) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 2027661 + ... + 2027696.

Almost surely, 2^72996426 is an apocalyptic number.

72996426 is an abundant number, since it is smaller than the sum of its proper divisors (85162536).

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

72996426 is a wasteful number, since it uses less digits than its factorization.

72996426 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4055365 (or 4055362 counting only the distinct ones).

The product of its digits is 326592, while the sum is 45.

The square root of 72996426 is about 8543.7945902275. The cubic root of 72996426 is about 417.9270989979.

The spelling of 72996426 in words is "seventy-two million, nine hundred ninety-six thousand, four hundred twenty-six".