40409379 has 12 divisors (see below), whose sum is σ = 59727096. Its totient is φ = 26312832.

The previous prime is 40409377. The next prime is 40409381. The reversal of 40409379 is 97390404.

It is an interprime number because it is at equal distance from previous prime (40409377) and next prime (40409381).

It is not a de Polignac number, because 40409379 - 2¹ = 40409377 is a prime.

It is a super-2 number, since 2×40409379² = 3265835822331282, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (40409377) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 51822 + ... + 52595.

It is an arithmetic number, because the mean of its divisors is an integer number (4977258).

Almost surely, 2^40409379 is an apocalyptic number.

40409379 is a deficient number, since it is larger than the sum of its proper divisors (19317717).

40409379 is a wasteful number, since it uses less digits than its factorization.

40409379 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 104466 (or 104463 counting only the distinct ones).

The product of its (nonzero) digits is 27216, while the sum is 36.

The square root of 40409379 is about 6356.8371852675. The cubic root of 40409379 is about 343.1579453172.

The spelling of 40409379 in words is "forty million, four hundred nine thousand, three hundred seventy-nine".