40199823 has 12 divisors (see below), whose sum is σ = 58217848. Its totient is φ = 26730000.

The previous prime is 40199821. The next prime is 40199843. The reversal of 40199823 is 32899104.

It is not a de Polignac number, because 40199823 - 2¹ = 40199821 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 (40199821) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 2053 + ... + 9198.

Almost surely, 2^40199823 is an apocalyptic number.

40199823 is a deficient number, since it is larger than the sum of its proper divisors (18018025).

40199823 is a wasteful number, since it uses less digits than its factorization.

40199823 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 11654 (or 11651 counting only the distinct ones).

The product of its (nonzero) digits is 15552, while the sum is 36.

The square root of 40199823 is about 6340.3330354170. Note that the first 3 decimals coincide. The cubic root of 40199823 is about 342.5637311919.

The spelling of 40199823 in words is "forty million, one hundred ninety-nine thousand, eight hundred twenty-three".