551200428 has 72 divisors (see below), whose sum is σ = 1462406400. Its totient is φ = 174716256.

The previous prime is 551200417. The next prime is 551200439. The reversal of 551200428 is 824002155.

It is a happy number.

It is an interprime number because it is at equal distance from previous prime (551200417) and next prime (551200439).

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 146353 + ... + 150071.

It is an arithmetic number, because the mean of its divisors is an integer number (20311200).

Almost surely, 2^551200428 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 551200428, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (731203200).

551200428 is an abundant number, since it is smaller than the sum of its proper divisors (911205972).

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

551200428 is a wasteful number, since it uses less digits than its factorization.

551200428 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3931 (or 3926 counting only the distinct ones).

The product of its (nonzero) digits is 3200, while the sum is 27.

The square root of 551200428 is about 23477.6580603773. The cubic root of 551200428 is about 819.9169199985.

The spelling of 551200428 in words is "five hundred fifty-one million, two hundred thousand, four hundred twenty-eight".