40290029 has 4 divisors (see below), whose sum is σ = 43389276. Its totient is φ = 37190784.

The previous prime is 40290023. The next prime is 40290053. The reversal of 40290029 is 92009204.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 15389929 + 24900100 = 3923^2 + 4990^2 .

It is a cyclic number.

It is not a de Polignac number, because 40290029 - 2⁸ = 40289773 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (40290023) 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, 1549604 + ... + 1549629.

It is an arithmetic number, because the mean of its divisors is an integer number (10847319).

Almost surely, 2^40290029 is an apocalyptic number.

It is an amenable number.

40290029 is a deficient number, since it is larger than the sum of its proper divisors (3099247).

40290029 is a wasteful number, since it uses less digits than its factorization.

40290029 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3099246.

The product of its (nonzero) digits is 1296, while the sum is 26.

The square root of 40290029 is about 6347.4427134083. The cubic root of 40290029 is about 342.8197706206.

The spelling of 40290029 in words is "forty million, two hundred ninety thousand, twenty-nine".