40398197 has 8 divisors (see below), whose sum is σ = 47112000. Its totient is φ = 34626732.

The previous prime is 40398179. The next prime is 40398203. The reversal of 40398197 is 79189304.

It is a happy number.

It is not a de Polignac number, because 40398197 - 2²⁰ = 39349621 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (40398167) 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, 58547 + ... + 59232.

It is an arithmetic number, because the mean of its divisors is an integer number (5889000).

Almost surely, 2^40398197 is an apocalyptic number.

It is an amenable number.

40398197 is a deficient number, since it is larger than the sum of its proper divisors (6713803).

40398197 is an equidigital number, since it uses as much as digits as its factorization.

40398197 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 117800 (or 117786 counting only the distinct ones).

The product of its (nonzero) digits is 54432, while the sum is 41.

The square root of 40398197 is about 6355.9575989775. The cubic root of 40398197 is about 343.1262897442.

The spelling of 40398197 in words is "forty million, three hundred ninety-eight thousand, one hundred ninety-seven".