722071538 has 8 divisors (see below), whose sum is σ = 1083813888. Its totient is φ = 360800244.

The previous prime is 722071487. The next prime is 722071621. The reversal of 722071538 is 835170227.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a junction number, because it is equal to n+sod(n) for n = 722071498 and 722071507.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 113906 + ... + 120077.

It is an arithmetic number, because the mean of its divisors is an integer number (135476736).

Almost surely, 2^722071538 is an apocalyptic number.

722071538 is a deficient number, since it is larger than the sum of its proper divisors (361742350).

722071538 is a wasteful number, since it uses less digits than its factorization.

722071538 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 235528.

The product of its (nonzero) digits is 23520, while the sum is 35.

The square root of 722071538 is about 26871.3888364558. The cubic root of 722071538 is about 897.1397003510.

The spelling of 722071538 in words is "seven hundred twenty-two million, seventy-one thousand, five hundred thirty-eight".