736721944 has 64 divisors (see below), whose sum is σ = 1649571840. Its totient is φ = 301812480.

The previous prime is 736721939. The next prime is 736721957. The reversal of 736721944 is 449127637.

It is a super-2 number, since 2×736721944² = 1085518445542278272, which contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 736721944.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 141532 + ... + 146644.

It is an arithmetic number, because the mean of its divisors is an integer number (25774560).

Almost surely, 2^736721944 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 736721944, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (824785920).

736721944 is an abundant number, since it is smaller than the sum of its proper divisors (912849896).

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

736721944 is a wasteful number, since it uses less digits than its factorization.

736721944 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5240 (or 5236 counting only the distinct ones).

The product of its digits is 254016, while the sum is 43.

The square root of 736721944 is about 27142.6222756756. The cubic root of 736721944 is about 903.1666001583.

The spelling of 736721944 in words is "seven hundred thirty-six million, seven hundred twenty-one thousand, nine hundred forty-four".