722735842 has 4 divisors (see below), whose sum is σ = 1084103766. Its totient is φ = 361367920.

The previous prime is 722735821. The next prime is 722735857. The reversal of 722735842 is 248537227.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in only one way, i.e., 666620761 + 56115081 = 25819^2 + 7491^2 .

It is a super-2 number, since 2×722735842² = 1044694194622897928, which contains 22 as substring.

It is a Smith number, since the sum of its digits (40) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is a junction number, because it is equal to n+sod(n) for n = 722735795 and 722735804.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 180683959 + ... + 180683962.

Almost surely, 2^722735842 is an apocalyptic number.

722735842 is a deficient number, since it is larger than the sum of its proper divisors (361367924).

722735842 is a wasteful number, since it uses less digits than its factorization.

722735842 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 361367923.

The product of its digits is 188160, while the sum is 40.

The square root of 722735842 is about 26883.7467998789. The cubic root of 722735842 is about 897.4147381134.

The spelling of 722735842 in words is "seven hundred twenty-two million, seven hundred thirty-five thousand, eight hundred forty-two".