40029929 has 4 divisors (see below), whose sum is σ = 40066884. Its totient is φ = 39992976.

The previous prime is 40029901. The next prime is 40029961. The reversal of 40029929 is 92992004.

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 5784025 + 34245904 = 2405^2 + 5852^2 .

It is a cyclic number.

It is not a de Polignac number, because 40029929 - 2⁸ = 40029673 is a prime.

It is a Duffinian number.

It is a plaindrome in base 15.

It is not an unprimeable number, because it can be changed into a prime (40029989) 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, 16802 + ... + 19035.

It is an arithmetic number, because the mean of its divisors is an integer number (10016721).

Almost surely, 2^40029929 is an apocalyptic number.

It is an amenable number.

40029929 is a deficient number, since it is larger than the sum of its proper divisors (36955).

40029929 is a wasteful number, since it uses less digits than its factorization.

40029929 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 36954.

The product of its (nonzero) digits is 11664, while the sum is 35.

The square root of 40029929 is about 6326.9209731116. The cubic root of 40029929 is about 342.0804645207.

It can be divided in two parts, 4002 and 9929, that added together give a palindrome (13931).

The spelling of 40029929 in words is "forty million, twenty-nine thousand, nine hundred twenty-nine".