40397901 has 8 divisors (see below), whose sum is σ = 54469440. Its totient is φ = 26629152.

The previous prime is 40397887. The next prime is 40397909. The reversal of 40397901 is 10979304.

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

It is not a de Polignac number, because 40397901 - 2⁵ = 40397869 is a prime.

It is a Smith number, since the sum of its digits (33) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (40397909) 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, 75385 + ... + 75918.

It is an arithmetic number, because the mean of its divisors is an integer number (6808680).

Almost surely, 2^40397901 is an apocalyptic number.

It is an amenable number.

40397901 is a deficient number, since it is larger than the sum of its proper divisors (14071539).

40397901 is a wasteful number, since it uses less digits than its factorization.

40397901 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 151395.

The product of its (nonzero) digits is 6804, while the sum is 33.

The square root of 40397901 is about 6355.9343136946. The cubic root of 40397901 is about 343.1254517066.

The spelling of 40397901 in words is "forty million, three hundred ninety-seven thousand, nine hundred one".