744723506 has 24 divisors (see below), whose sum is σ = 1187737020. Its totient is φ = 350142336.

The previous prime is 744723491. The next prime is 744723521. The reversal of 744723506 is 605327447.

It is an interprime number because it is at equal distance from previous prime (744723491) and next prime (744723521).

It can be written as a sum of positive squares in 2 ways, for example, as 743380225 + 1343281 = 27265^2 + 1159^2 .

It is a super-2 number, since 2×744723506² = 1109226200777864072, which contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (38).

It is a Curzon number.

It is a self number, because there is not a number n which added to its sum of digits gives 744723506.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 95150 + ... + 102678.

Almost surely, 2^744723506 is an apocalyptic number.

744723506 is a deficient number, since it is larger than the sum of its proper divisors (443013514).

744723506 is a wasteful number, since it uses less digits than its factorization.

744723506 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7706 (or 7687 counting only the distinct ones).

The product of its (nonzero) digits is 141120, while the sum is 38.

The square root of 744723506 is about 27289.6226796927. The cubic root of 744723506 is about 906.4246077132.

The spelling of 744723506 in words is "seven hundred forty-four million, seven hundred twenty-three thousand, five hundred six".