722490736 has 40 divisors (see below), whose sum is σ = 1533120624. Its totient is φ = 327106560.

The previous prime is 722490733. The next prime is 722490737. The reversal of 722490736 is 637094227.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (722490733) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 37246 + ... + 53218.

Almost surely, 2^722490736 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 722490736, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (766560312).

722490736 is an abundant number, since it is smaller than the sum of its proper divisors (810629888).

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

722490736 is a wasteful number, since it uses less digits than its factorization.

722490736 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 16249 (or 16243 counting only the distinct ones).

The product of its (nonzero) digits is 127008, while the sum is 40.

The square root of 722490736 is about 26879.1877853480. The cubic root of 722490736 is about 897.3132779881.

The spelling of 722490736 in words is "seven hundred twenty-two million, four hundred ninety thousand, seven hundred thirty-six".