40090729 has 8 divisors (see below), whose sum is σ = 45938880. Its totient is φ = 34272816.

The previous prime is 40090727. The next prime is 40090733. The reversal of 40090729 is 92709004.

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 40090729 - 2¹ = 40090727 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 40090729.

It is not an unprimeable number, because it can be changed into a prime (40090727) 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, 4639 + ... + 10084.

It is an arithmetic number, because the mean of its divisors is an integer number (5742360).

Almost surely, 2^40090729 is an apocalyptic number.

It is an amenable number.

40090729 is a deficient number, since it is larger than the sum of its proper divisors (5848151).

40090729 is a wasteful number, since it uses less digits than its factorization.

40090729 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 15119.

The product of its (nonzero) digits is 4536, while the sum is 31.

The square root of 40090729 is about 6331.7240148320. The cubic root of 40090729 is about 342.2535680928.

The spelling of 40090729 in words is "forty million, ninety thousand, seven hundred twenty-nine".