40550729 has 16 divisors (see below), whose sum is σ = 44997120. Its totient is φ = 36368640.

The previous prime is 40550723. The next prime is 40550743. The reversal of 40550729 is 92705504.

It is a cyclic number.

It is not a de Polignac number, because 40550729 - 2⁸ = 40550473 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 40550695 and 40550704.

It is not an unprimeable number, because it can be changed into a prime (40550723) 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, 40424 + ... + 41414.

It is an arithmetic number, because the mean of its divisors is an integer number (2812320).

Almost surely, 2^40550729 is an apocalyptic number.

It is an amenable number.

40550729 is a deficient number, since it is larger than the sum of its proper divisors (4446391).

40550729 is a wasteful number, since it uses less digits than its factorization.

40550729 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1120.

The product of its (nonzero) digits is 12600, while the sum is 32.

The square root of 40550729 is about 6367.9454300426. The cubic root of 40550729 is about 343.5575961735.

The spelling of 40550729 in words is "forty million, five hundred fifty thousand, seven hundred twenty-nine".