744256247 has 6 divisors (see below), whose sum is σ = 865767528. Its totient is φ = 637933884.

The previous prime is 744256229. The next prime is 744256259. The reversal of 744256247 is 742652447.

It is not a de Polignac number, because 744256247 - 2²⁸ = 475820791 is a prime.

It is a super-2 number, since 2×744256247² = 1107834722397050018, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (744256217) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 7594403 + ... + 7594500.

It is an arithmetic number, because the mean of its divisors is an integer number (144294588).

Almost surely, 2^744256247 is an apocalyptic number.

744256247 is a deficient number, since it is larger than the sum of its proper divisors (121511281).

744256247 is a wasteful number, since it uses less digits than its factorization.

744256247 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 15188917 (or 15188910 counting only the distinct ones).

The product of its digits is 376320, while the sum is 41.

The square root of 744256247 is about 27281.0602249986. The cubic root of 744256247 is about 906.2349965522.

The spelling of 744256247 in words is "seven hundred forty-four million, two hundred fifty-six thousand, two hundred forty-seven".