72403230426 has 16 divisors (see below), whose sum is σ = 145673567424. Its totient is φ = 23989892384.

The previous prime is 72403230323. The next prime is 72403230433. The reversal of 72403230426 is 62403230427.

It is a super-2 number, since 2×72403230426² (a number of 23 digits) contains 22 as substring.

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, 36128355 + ... + 36130358.

It is an arithmetic number, because the mean of its divisors is an integer number (9104597964).

Almost surely, 2^72403230426 is an apocalyptic number.

72403230426 is an abundant number, since it is smaller than the sum of its proper divisors (73270336998).

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

72403230426 is a wasteful number, since it uses less digits than its factorization.

72403230426 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 72258885.

The product of its (nonzero) digits is 48384, while the sum is 33.

Subtracting from 72403230426 its reverse (62403230427), we obtain a palindrome (9999999999).

The spelling of 72403230426 in words is "seventy-two billion, four hundred three million, two hundred thirty thousand, four hundred twenty-six".