40038829 has 4 divisors (see below), whose sum is σ = 40260220. Its totient is φ = 39817440.

The previous prime is 40038809. The next prime is 40038839. The reversal of 40038829 is 92883004.

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 6375625 + 33663204 = 2525^2 + 5802^2 .

It is a cyclic number.

It is not a de Polignac number, because 40038829 - 2¹⁵ = 40006061 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 40038794 and 40038803.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (40038809) 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, 110424 + ... + 110785.

It is an arithmetic number, because the mean of its divisors is an integer number (10065055).

Almost surely, 2^40038829 is an apocalyptic number.

It is an amenable number.

40038829 is a deficient number, since it is larger than the sum of its proper divisors (221391).

40038829 is a wasteful number, since it uses less digits than its factorization.

40038829 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 221390.

The product of its (nonzero) digits is 13824, while the sum is 34.

The square root of 40038829 is about 6327.6242777207. The cubic root of 40038829 is about 342.1058146409.

The spelling of 40038829 in words is "forty million, thirty-eight thousand, eight hundred twenty-nine".