551697328 has 160 divisors (see below), whose sum is σ = 1439907840. Its totient is φ = 198512640.

The previous prime is 551697283. The next prime is 551697331. The reversal of 551697328 is 823796155.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 766953 + ... + 767671.

It is an arithmetic number, because the mean of its divisors is an integer number (8999424).

Almost surely, 2^551697328 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 551697328, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (719953920).

551697328 is an abundant number, since it is smaller than the sum of its proper divisors (888210512).

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

551697328 is a wasteful number, since it uses less digits than its factorization.

551697328 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 795 (or 789 counting only the distinct ones).

The product of its digits is 453600, while the sum is 46.

The square root of 551697328 is about 23488.2380778125. The cubic root of 551697328 is about 820.1632274704.

The spelling of 551697328 in words is "five hundred fifty-one million, six hundred ninety-seven thousand, three hundred twenty-eight".