7740729 has 12 divisors (see below), whose sum is σ = 11838996. Its totient is φ = 4856832.

The previous prime is 7740727. The next prime is 7740739. The reversal of 7740729 is 9270477.

7740729 is digitally balanced in base 3, because in such base it contains all the possibile digits an equal number of times.

It can be written as a sum of positive squares in 2 ways, for example, as 4928400 + 2812329 = 2220^2 + 1677^2 .

It is not a de Polignac number, because 7740729 - 2¹ = 7740727 is a prime.

It is a Smith number, since the sum of its digits (36) coincides with the sum of the digits of its prime factors.

It is a junction number, because it is equal to n+sod(n) for n = 7740693 and 7740702.

It is not an unprimeable number, because it can be changed into a prime (7740727) by changing a digit.

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, 25144 + ... + 25449.

It is an arithmetic number, because the mean of its divisors is an integer number (986583).

Almost surely, 2^7740729 is an apocalyptic number.

It is an amenable number.

7740729 is a deficient number, since it is larger than the sum of its proper divisors (4098267).

7740729 is a wasteful number, since it uses less digits than its factorization.

7740729 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 50616 (or 50613 counting only the distinct ones).

The product of its (nonzero) digits is 24696, while the sum is 36.

The square root of 7740729 is about 2782.2165623833. The cubic root of 7740729 is about 197.8156380012.

The spelling of 7740729 in words is "seven million, seven hundred forty thousand, seven hundred twenty-nine".