736440731 has 16 divisors (see below), whose sum is σ = 841232448. Its totient is φ = 638668800.

The previous prime is 736440721. The next prime is 736440763. The reversal of 736440731 is 137044637.

It is a cyclic number.

It is not a de Polignac number, because 736440731 - 2¹⁰ = 736439707 is a prime.

It is a super-2 number, since 2×736440731² = 1084689900551628722, which contains 22 as substring.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 736440691 and 736440700.

It is not an unprimeable number, because it can be changed into a prime (736440721) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 136811 + ... + 142091.

It is an arithmetic number, because the mean of its divisors is an integer number (52577028).

Almost surely, 2^736440731 is an apocalyptic number.

736440731 is a deficient number, since it is larger than the sum of its proper divisors (104791717).

736440731 is a wasteful number, since it uses less digits than its factorization.

736440731 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5942.

The product of its (nonzero) digits is 42336, while the sum is 35.

The square root of 736440731 is about 27137.4414969429. The cubic root of 736440731 is about 903.0516700892.

The spelling of 736440731 in words is "seven hundred thirty-six million, four hundred forty thousand, seven hundred thirty-one".