40397161 has 8 divisors (see below), whose sum is σ = 46577664. Its totient is φ = 34319040.

The previous prime is 40397129. The next prime is 40397191. The reversal of 40397161 is 16179304.

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 40397161 - 2⁵ = 40397129 is a prime.

It is not an unprimeable number, because it can be changed into a prime (40397191) 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, 24745 + ... + 26326.

It is an arithmetic number, because the mean of its divisors is an integer number (5822208).

Almost surely, 2^40397161 is an apocalyptic number.

It is an amenable number.

40397161 is a deficient number, since it is larger than the sum of its proper divisors (6180503).

40397161 is a wasteful number, since it uses less digits than its factorization.

40397161 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 51191.

The product of its (nonzero) digits is 4536, while the sum is 31.

The square root of 40397161 is about 6355.8761001140. The cubic root of 40397161 is about 343.1233565946.

The spelling of 40397161 in words is "forty million, three hundred ninety-seven thousand, one hundred sixty-one".