722246538 has 16 divisors (see below), whose sum is σ = 1555608096. Its totient is φ = 222229680.

The previous prime is 722246521. The next prime is 722246557. The reversal of 722246538 is 835642227.

It is a Harshad number since it is a multiple of its sum of digits (39).

It is a junction number, because it is equal to n+sod(n) for n = 722246496 and 722246505.

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, 4629708 + ... + 4629863.

It is an arithmetic number, because the mean of its divisors is an integer number (97225506).

Almost surely, 2^722246538 is an apocalyptic number.

722246538 is a gapful number since it is divisible by the number (78) formed by its first and last digit.

722246538 is an abundant number, since it is smaller than the sum of its proper divisors (833361558).

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

722246538 is a wasteful number, since it uses less digits than its factorization.

722246538 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 9259589.

The product of its digits is 161280, while the sum is 39.

The square root of 722246538 is about 26874.6448906772. The cubic root of 722246538 is about 897.2121709017.

The spelling of 722246538 in words is "seven hundred twenty-two million, two hundred forty-six thousand, five hundred thirty-eight".