404540139 has 8 divisors (see below), whose sum is σ = 550863360. Its totient is φ = 263955176.

The previous prime is 404540137. The next prime is 404540141. The reversal of 404540139 is 931045404.

It is an interprime number because it is at equal distance from previous prime (404540137) and next prime (404540141).

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 404540139 - 2¹ = 404540137 is a prime.

It is not an unprimeable number, because it can be changed into a prime (404540137) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1434399 + ... + 1434680.

It is an arithmetic number, because the mean of its divisors is an integer number (68857920).

Almost surely, 2^404540139 is an apocalyptic number.

404540139 is a deficient number, since it is larger than the sum of its proper divisors (146323221).

404540139 is a wasteful number, since it uses less digits than its factorization.

404540139 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2869129.

The product of its (nonzero) digits is 8640, while the sum is 30.

The square root of 404540139 is about 20113.1832140017. The cubic root of 404540139 is about 739.5834879118.

The spelling of 404540139 in words is "four hundred four million, five hundred forty thousand, one hundred thirty-nine".