40206729 has 8 divisors (see below), whose sum is σ = 54211680. Its totient is φ = 26503136.

The previous prime is 40206709. The next prime is 40206811. The reversal of 40206729 is 92760204.

It is a happy number.

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

It is a cyclic number.

It is not a de Polignac number, because 40206729 - 2¹⁹ = 39682441 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 40206696 and 40206705.

It is not an unprimeable number, because it can be changed into a prime (40206709) 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, 75027 + ... + 75560.

It is an arithmetic number, because the mean of its divisors is an integer number (6776460).

Almost surely, 2^40206729 is an apocalyptic number.

It is an amenable number.

40206729 is a deficient number, since it is larger than the sum of its proper divisors (14004951).

40206729 is a wasteful number, since it uses less digits than its factorization.

40206729 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 150679.

The product of its (nonzero) digits is 6048, while the sum is 30.

The square root of 40206729 is about 6340.8776206453. The cubic root of 40206729 is about 342.5833466155.

The spelling of 40206729 in words is "forty million, two hundred six thousand, seven hundred twenty-nine".