40049 has 4 divisors (see below), whose sum is σ = 41460. Its totient is φ = 38640.

The previous prime is 40039. The next prime is 40063. The reversal of 40049 is 94004.

40049 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

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 19600 + 20449 = 140^2 + 143^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-40049 is a prime.

It is a magnanimous number.

It is an Ulam number.

It is a Duffinian number.

It is a plaindrome in base 15.

It is an inconsummate number, since it does not exist a number n which divided by its sum of digits gives 40049.

It is not an unprimeable number, because it can be changed into a prime (40009) 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, 662 + ... + 719.

It is an arithmetic number, because the mean of its divisors is an integer number (10365).

2⁴⁰⁰⁴⁹ is an apocalyptic number.

It is an amenable number.

40049 is a deficient number, since it is larger than the sum of its proper divisors (1411).

40049 is a wasteful number, since it uses less digits than its factorization.

40049 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1410.

The product of its (nonzero) digits is 144, while the sum is 17.

The square root of 40049 is about 200.1224625073. The cubic root of 40049 is about 34.2134780387.

It can be divided in two parts, 400 and 49, that multiplied together give a square (19600 = 140²).

The spelling of 40049 in words is "forty thousand, forty-nine".