551408 has 40 divisors (see below), whose sum is σ = 1260336. Its totient is φ = 230400.

The previous prime is 551407. The next prime is 551423. The reversal of 551408 is 804155.

It is a congruent number.

It is an inconsummate number, since it does not exist a number n which divided by its sum of digits gives 551408.

It is not an unprimeable number, because it can be changed into a prime (551407) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 2168 + ... + 2408.

2⁵⁵¹⁴⁰⁸ is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 551408, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (630168).

551408 is an abundant number, since it is smaller than the sum of its proper divisors (708928).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

551408 is a wasteful number, since it uses less digits than its factorization.

551408 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 273 (or 267 counting only the distinct ones).

The product of its (nonzero) digits is 800, while the sum is 23.

The square root of 551408 is about 742.5685153573. The cubic root of 551408 is about 82.0019828987.

It can be divided in two parts, 551 and 408, that added together give a palindrome (959).

The spelling of 551408 in words is "five hundred fifty-one thousand, four hundred eight".