722242836 has 144 divisors (see below), whose sum is σ = 2191687680. Its totient is φ = 196188480.

The previous prime is 722242823. The next prime is 722242837. The reversal of 722242836 is 638242227.

It is a happy number.

722242836 is a `hidden beast` number, since 7 + 222 + 428 + 3 + 6 = 666.

It is a Harshad number since it is a multiple of its sum of digits (36).

It is a self number, because there is not a number n which added to its sum of digits gives 722242836.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (722242837) by changing a digit.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 460125 + ... + 461691.

Almost surely, 2^722242836 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 722242836, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1095843840).

722242836 is an abundant number, since it is smaller than the sum of its proper divisors (1469444844).

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

722242836 is a wasteful number, since it uses less digits than its factorization.

722242836 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1674 (or 1669 counting only the distinct ones).

The product of its digits is 64512, while the sum is 36.

The square root of 722242836 is about 26874.5760152602. The cubic root of 722242836 is about 897.2106379601.

The spelling of 722242836 in words is "seven hundred twenty-two million, two hundred forty-two thousand, eight hundred thirty-six".