551898720 has 216 divisors, whose sum is σ = 1933324848. Its totient is φ = 143354880.

The previous prime is 551898713. The next prime is 551898733. The reversal of 551898720 is 27898155.

It is a happy number.

551898720 is a `hidden beast` number, since 551 + 8 + 98 + 7 + 2 + 0 = 666.

It is a Harshad number since it is a multiple of its sum of digits (45).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 35 ways as a sum of consecutive naturals, for example, 5358189 + ... + 5358291.

It is an arithmetic number, because the mean of its divisors is an integer number (8950578).

Almost surely, 2^551898720 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 551898720, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (966662424).

551898720 is an abundant number, since it is smaller than the sum of its proper divisors (1381426128).

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

551898720 is a wasteful number, since it uses less digits than its factorization.

551898720 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 246 (or 174 counting only the distinct ones).

The product of its (nonzero) digits is 201600, while the sum is 45.

The square root of 551898720 is about 23492.5247685301. The cubic root of 551898720 is about 820.2630129929.

The spelling of 551898720 in words is "five hundred fifty-one million, eight hundred ninety-eight thousand, seven hundred twenty".