40000029 has 4 divisors (see below), whose sum is σ = 53333376. Its totient is φ = 26666684.

The previous prime is 40000021. The next prime is 40000033. The reversal of 40000029 is 92000004.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 40000029 - 2³ = 40000021 is a prime.

It is a Curzon number.

It is a junction number, because it is equal to n+sod(n) for n = 39999972 and 40000017.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (40000021) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 6666669 + ... + 6666674.

It is an arithmetic number, because the mean of its divisors is an integer number (13333344).

Almost surely, 2^40000029 is an apocalyptic number.

It is an amenable number.

40000029 is a deficient number, since it is larger than the sum of its proper divisors (13333347).

40000029 is a wasteful number, since it uses less digits than its factorization.

40000029 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 13333346.

The product of its (nonzero) digits is 72, while the sum is 15.

The square root of 40000029 is about 6324.5576129876. The cubic root of 40000029 is about 341.9952719842.

The spelling of 40000029 in words is "forty million, twenty-nine", and thus it is an aban number and an uban number.