40140029 has 4 divisors (see below), whose sum is σ = 40156284. Its totient is φ = 40123776.

The previous prime is 40140019. The next prime is 40140047. The reversal of 40140029 is 92004104.

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 25775929 + 14364100 = 5077^2 + 3790^2 .

It is a cyclic number.

It is not a de Polignac number, because 40140029 - 2⁸ = 40139773 is a prime.

It is a super-2 number, since 2×40140029² = 3222443856241682, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (40140019) 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, 3572 + ... + 9645.

It is an arithmetic number, because the mean of its divisors is an integer number (10039071).

Almost surely, 2^40140029 is an apocalyptic number.

It is an amenable number.

40140029 is a deficient number, since it is larger than the sum of its proper divisors (16255).

40140029 is a wasteful number, since it uses less digits than its factorization.

40140029 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 16254.

The product of its (nonzero) digits is 288, while the sum is 20.

The square root of 40140029 is about 6335.6159132321. The cubic root of 40140029 is about 342.3938015890.

The spelling of 40140029 in words is "forty million, one hundred forty thousand, twenty-nine".