551878990 has 128 divisors (see below), whose sum is σ = 1197504000. Its totient is φ = 181149696.

The previous prime is 551878949. The next prime is 551878991. The reversal of 551878990 is 99878155.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (551878991) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 5063056 + ... + 5063164.

It is an arithmetic number, because the mean of its divisors is an integer number (9355500).

Almost surely, 2^551878990 is an apocalyptic number.

551878990 is an abundant number, since it is smaller than the sum of its proper divisors (645625010).

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

551878990 is a wasteful number, since it uses less digits than its factorization.

551878990 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 254.

The product of its (nonzero) digits is 907200, while the sum is 52.

The square root of 551878990 is about 23492.1048439683. The cubic root of 551878990 is about 820.2532382634.

The spelling of 551878990 in words is "five hundred fifty-one million, eight hundred seventy-eight thousand, nine hundred ninety".