72256426 has 32 divisors (see below), whose sum is σ = 128132928. Its totient is φ = 30186240.

The previous prime is 72256423. The next prime is 72256439. The reversal of 72256426 is 62465227.

It is a Harshad number since it is a multiple of its sum of digits (34).

It is a junction number, because it is equal to n+sod(n) for n = 72256391 and 72256400.

It is not an unprimeable number, because it can be changed into a prime (72256423) 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 15 ways as a sum of consecutive naturals, for example, 13836 + ... + 18328.

It is an arithmetic number, because the mean of its divisors is an integer number (4004154).

Almost surely, 2^72256426 is an apocalyptic number.

72256426 is a deficient number, since it is larger than the sum of its proper divisors (55876502).

72256426 is a wasteful number, since it uses less digits than its factorization.

72256426 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4566.

The product of its digits is 40320, while the sum is 34.

The square root of 72256426 is about 8500.3779915954. The cubic root of 72256426 is about 416.5100568412.

The spelling of 72256426 in words is "seventy-two million, two hundred fifty-six thousand, four hundred twenty-six".