40409156 has 6 divisors (see below), whose sum is σ = 70716030. Its totient is φ = 20204576.

The previous prime is 40409147. The next prime is 40409179. The reversal of 40409156 is 65190404.

It can be written as a sum of positive squares in only one way, i.e., 36409156 + 4000000 = 6034^2 + 2000^2 .

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 5051141 + ... + 5051148.

It is an arithmetic number, because the mean of its divisors is an integer number (11786005).

Almost surely, 2^40409156 is an apocalyptic number.

It is an amenable number.

40409156 is a deficient number, since it is larger than the sum of its proper divisors (30306874).

40409156 is a wasteful number, since it uses less digits than its factorization.

40409156 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 10102293 (or 10102291 counting only the distinct ones).

The product of its (nonzero) digits is 4320, while the sum is 29.

The square root of 40409156 is about 6356.8196450741. The cubic root of 40409156 is about 343.1573140746.

The spelling of 40409156 in words is "forty million, four hundred nine thousand, one hundred fifty-six".