406833389 has 4 divisors (see below), whose sum is σ = 417828924. Its totient is φ = 395837856.

The previous prime is 406833359. The next prime is 406833403. The reversal of 406833389 is 983338604.

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

It can be written as a sum of positive squares in 2 ways, for example, as 363207364 + 43626025 = 19058^2 + 6605^2 .

It is a cyclic number.

It is not a de Polignac number, because 406833389 - 2¹⁶ = 406767853 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 (406833319) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 5497712 + ... + 5497785.

It is an arithmetic number, because the mean of its divisors is an integer number (104457231).

Almost surely, 2^406833389 is an apocalyptic number.

It is an amenable number.

406833389 is a deficient number, since it is larger than the sum of its proper divisors (10995535).

406833389 is a wasteful number, since it uses less digits than its factorization.

406833389 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 10995534.

The product of its (nonzero) digits is 373248, while the sum is 44.

The square root of 406833389 is about 20170.1112788205. Note that the first 3 decimals coincide. The cubic root of 406833389 is about 740.9783680731.

The spelling of 406833389 in words is "four hundred six million, eight hundred thirty-three thousand, three hundred eighty-nine".