40397233 has 4 divisors (see below), whose sum is σ = 40416768. Its totient is φ = 40377700.

The previous prime is 40397221. The next prime is 40397243. The reversal of 40397233 is 33279304.

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 a de Polignac number, because none of the positive numbers 2^k-40397233 is a prime.

It is a Smith number, since the sum of its digits (31) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 40397195 and 40397204.

It is not an unprimeable number, because it can be changed into a prime (40397243) 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, 6241 + ... + 10942.

It is an arithmetic number, because the mean of its divisors is an integer number (10104192).

Almost surely, 2^40397233 is an apocalyptic number.

It is an amenable number.

40397233 is a deficient number, since it is larger than the sum of its proper divisors (19535).

40397233 is a wasteful number, since it uses less digits than its factorization.

40397233 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 19534.

The product of its (nonzero) digits is 13608, while the sum is 31.

The square root of 40397233 is about 6355.8817641614. The cubic root of 40397233 is about 343.1235604444.

The spelling of 40397233 in words is "forty million, three hundred ninety-seven thousand, two hundred thirty-three".