740305731 has 16 divisors (see below), whose sum is σ = 1105913088. Its totient is φ = 436543200.

The previous prime is 740305703. The next prime is 740305777. The reversal of 740305731 is 137503047.

It is not a de Polignac number, because 740305731 - 2²¹ = 738208579 is a prime.

It is a super-2 number, since 2×740305731² = 1096105150702888722, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (740305781) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 301935 + ... + 304376.

It is an arithmetic number, because the mean of its divisors is an integer number (69119568).

Almost surely, 2^740305731 is an apocalyptic number.

740305731 is a deficient number, since it is larger than the sum of its proper divisors (365607357).

740305731 is a wasteful number, since it uses less digits than its factorization.

740305731 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 606362.

The product of its (nonzero) digits is 8820, while the sum is 30.

The square root of 740305731 is about 27208.5598847128. The cubic root of 740305731 is about 904.6287177995.

Adding to 740305731 its reverse (137503047), we get a palindrome (877808778).

The spelling of 740305731 in words is "seven hundred forty million, three hundred five thousand, seven hundred thirty-one".