40729749 has 8 divisors (see below), whose sum is σ = 57164640. Its totient is φ = 25724016.

The previous prime is 40729727. The next prime is 40729763. The reversal of 40729749 is 94792704.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 40729749 - 2⁹ = 40729237 is a prime.

It is a Smith number, since the sum of its digits (42) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is a self number, because there is not a number n which added to its sum of digits gives 40729749.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (40729709) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 357222 + ... + 357335.

It is an arithmetic number, because the mean of its divisors is an integer number (7145580).

Almost surely, 2^40729749 is an apocalyptic number.

It is an amenable number.

40729749 is a deficient number, since it is larger than the sum of its proper divisors (16434891).

40729749 is a wasteful number, since it uses less digits than its factorization.

40729749 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 714579.

The product of its (nonzero) digits is 127008, while the sum is 42.

The square root of 40729749 is about 6381.9862895497. The cubic root of 40729749 is about 344.0624238843.

The spelling of 40729749 in words is "forty million, seven hundred twenty-nine thousand, seven hundred forty-nine".