40039197 has 16 divisors (see below), whose sum is σ = 60119040. Its totient is φ = 23482800.

The previous prime is 40039189. The next prime is 40039211. The reversal of 40039197 is 79193004.

It is not a de Polignac number, because 40039197 - 2³ = 40039189 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (33).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (40039147) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 18547 + ... + 20592.

It is an arithmetic number, because the mean of its divisors is an integer number (3757440).

Almost surely, 2^40039197 is an apocalyptic number.

It is an amenable number.

40039197 is a deficient number, since it is larger than the sum of its proper divisors (20079843).

40039197 is a wasteful number, since it uses less digits than its factorization.

40039197 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 39184.

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

The square root of 40039197 is about 6327.6533564980. The cubic root of 40039197 is about 342.1068627447.

The spelling of 40039197 in words is "forty million, thirty-nine thousand, one hundred ninety-seven".