72904426 has 32 divisors (see below), whose sum is σ = 129019392. Its totient is φ = 30249600.

The previous prime is 72904423. The next prime is 72904427. The reversal of 72904426 is 62440927.

It is a junction number, because it is equal to n+sod(n) for n = 72904391 and 72904400.

It is not an unprimeable number, because it can be changed into a prime (72904421) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 65910 + ... + 67006.

It is an arithmetic number, because the mean of its divisors is an integer number (4031856).

Almost surely, 2^72904426 is an apocalyptic number.

72904426 is a deficient number, since it is larger than the sum of its proper divisors (56114966).

72904426 is a wasteful number, since it uses less digits than its factorization.

72904426 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1254.

The product of its (nonzero) digits is 24192, while the sum is 34.

The square root of 72904426 is about 8538.4088681674. The cubic root of 72904426 is about 417.7514490401.

The spelling of 72904426 in words is "seventy-two million, nine hundred four thousand, four hundred twenty-six".