406140233 has 4 divisors (see below), whose sum is σ = 423798528. Its totient is φ = 388481940.

The previous prime is 406140223. The next prime is 406140239. The reversal of 406140233 is 332041604.

It is a happy number.

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 406140233 - 2⁸ = 406139977 is a prime.

It is a super-2 number, since 2×406140233² = 329899777722588578, which contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (23), and also a Moran number because the ratio is a prime number: 17658271 = 406140233 / (4 + 0 + 6 + 1 + 4 + 0 + 2 + 3 + 3).

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 406140199 and 406140208.

It is not an unprimeable number, because it can be changed into a prime (406140239) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 8829113 + ... + 8829158.

It is an arithmetic number, because the mean of its divisors is an integer number (105949632).

Almost surely, 2^406140233 is an apocalyptic number.

It is an amenable number.

406140233 is a deficient number, since it is larger than the sum of its proper divisors (17658295).

406140233 is a wasteful number, since it uses less digits than its factorization.

406140233 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 17658294.

The product of its (nonzero) digits is 1728, while the sum is 23.

The square root of 406140233 is about 20152.9212026445. The cubic root of 406140233 is about 740.5573066202.

Adding to 406140233 its reverse (332041604), we get a palindrome (738181837).

The spelling of 406140233 in words is "four hundred six million, one hundred forty thousand, two hundred thirty-three".