40040297 has 4 divisors (see below), whose sum is σ = 43680336. Its totient is φ = 36400260.

The previous prime is 40040293. The next prime is 40040393. The reversal of 40040297 is 79204004.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 40040297 - 2² = 40040293 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (40040293) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1820003 + ... + 1820024.

It is an arithmetic number, because the mean of its divisors is an integer number (10920084).

Almost surely, 2^40040297 is an apocalyptic number.

It is an amenable number.

40040297 is a deficient number, since it is larger than the sum of its proper divisors (3640039).

40040297 is a wasteful number, since it uses less digits than its factorization.

40040297 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3640038.

The product of its (nonzero) digits is 2016, while the sum is 26.

The square root of 40040297 is about 6327.7402759595. The cubic root of 40040297 is about 342.1099956256.

The spelling of 40040297 in words is "forty million, forty thousand, two hundred ninety-seven".