40297807 has 4 divisors (see below), whose sum is σ = 43961256. Its totient is φ = 36634360.

The previous prime is 40297781. The next prime is 40297819. The reversal of 40297807 is 70879204.

It is a happy number.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 40297807 - 2¹⁵ = 40265039 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 (40297867) 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, 1831708 + ... + 1831729.

It is an arithmetic number, because the mean of its divisors is an integer number (10990314).

Almost surely, 2^40297807 is an apocalyptic number.

40297807 is a deficient number, since it is larger than the sum of its proper divisors (3663449).

40297807 is a wasteful number, since it uses less digits than its factorization.

40297807 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3663448.

The product of its (nonzero) digits is 28224, while the sum is 37.

The square root of 40297807 is about 6348.0553715291. The cubic root of 40297807 is about 342.8418296815.

The spelling of 40297807 in words is "forty million, two hundred ninety-seven thousand, eight hundred seven".