40365997 has 8 divisors (see below), whose sum is σ = 47114496. Its totient is φ = 33862992.

The previous prime is 40365961. The next prime is 40366031. The reversal of 40365997 is 79956304.

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

It is a cyclic number.

It is not a de Polignac number, because 40365997 - 2²³ = 31977389 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 (40365097) 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, 61018 + ... + 61675.

It is an arithmetic number, because the mean of its divisors is an integer number (5889312).

Almost surely, 2^40365997 is an apocalyptic number.

40365997 is a gapful number since it is divisible by the number (47) formed by its first and last digit.

It is an amenable number.

40365997 is a deficient number, since it is larger than the sum of its proper divisors (6748499).

40365997 is a wasteful number, since it uses less digits than its factorization.

40365997 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 122747.

The product of its (nonzero) digits is 204120, while the sum is 43.

The square root of 40365997 is about 6353.4240374777. The cubic root of 40365997 is about 343.0351008286.

The spelling of 40365997 in words is "forty million, three hundred sixty-five thousand, nine hundred ninety-seven".