40040161 has 8 divisors (see below), whose sum is σ = 45800640. Its totient is φ = 34289808.

The previous prime is 40040153. The next prime is 40040177. The reversal of 40040161 is 16104004.

It is a happy number.

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

It is not a de Polignac number, because 40040161 - 2³ = 40040153 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (40040111) 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, 10290 + ... + 13636.

It is an arithmetic number, because the mean of its divisors is an integer number (5725080).

Almost surely, 2^40040161 is an apocalyptic number.

It is an amenable number.

40040161 is a deficient number, since it is larger than the sum of its proper divisors (5760479).

40040161 is a wasteful number, since it uses less digits than its factorization.

40040161 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5063.

The product of its (nonzero) digits is 96, while the sum is 16.

The square root of 40040161 is about 6327.7295296180. The cubic root of 40040161 is about 342.1096082907.

Adding to 40040161 its reverse (16104004), we get a palindrome (56144165).

The spelling of 40040161 in words is "forty million, forty thousand, one hundred sixty-one".