253404406 has 8 divisors (see below), whose sum is σ = 400112280. Its totient is φ = 120033648.

The previous prime is 253404391. The next prime is 253404419. The reversal of 253404406 is 604404352.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 3334231 + ... + 3334306.

It is an arithmetic number, because the mean of its divisors is an integer number (50014035).

Almost surely, 2^253404406 is an apocalyptic number.

253404406 is a deficient number, since it is larger than the sum of its proper divisors (146707874).

253404406 is a wasteful number, since it uses less digits than its factorization.

253404406 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6668558.

The product of its (nonzero) digits is 11520, while the sum is 28.

The square root of 253404406 is about 15918.6810383273. The cubic root of 253404406 is about 632.8071641527.

Adding to 253404406 its reverse (604404352), we get a palindrome (857808758).

The spelling of 253404406 in words is "two hundred fifty-three million, four hundred four thousand, four hundred six".