551786928 has 160 divisors (see below), whose sum is σ = 1854738432. Its totient is φ = 137068800.

The previous prime is 551786927. The next prime is 551786929. The reversal of 551786928 is 829687155.

551786928 = 4137² + 4138² + ... + 4168².

It is an interprime number because it is at equal distance from previous prime (551786927) and next prime (551786929).

It is not an unprimeable number, because it can be changed into a prime (551786927) by changing a digit.

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, 81763 + ... + 88253.

Almost surely, 2^551786928 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 551786928, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (927369216).

551786928 is an abundant number, since it is smaller than the sum of its proper divisors (1302951504).

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

551786928 is a wasteful number, since it uses less digits than its factorization.

551786928 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6543 (or 6537 counting only the distinct ones).

The product of its digits is 1209600, while the sum is 51.

The square root of 551786928 is about 23490.1453379923. The cubic root of 551786928 is about 820.2076253939.

The spelling of 551786928 in words is "five hundred fifty-one million, seven hundred eighty-six thousand, nine hundred twenty-eight".