551889990 has 32 divisors (see below), whose sum is σ = 1471707360. Its totient is φ = 147170592.

The previous prime is 551889973. The next prime is 551890019. The reversal of 551889990 is 99988155.

551889990 is a `hidden beast` number, since 551 + 8 + 89 + 9 + 9 + 0 = 666.

It is a super-2 number, since 2×551889990² = 609165122124400200, which contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (54).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 1021749 + ... + 1022288.

It is an arithmetic number, because the mean of its divisors is an integer number (45990855).

Almost surely, 2^551889990 is an apocalyptic number.

551889990 is an abundant number, since it is smaller than the sum of its proper divisors (919817370).

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

551889990 is a wasteful number, since it uses less digits than its factorization.

551889990 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2044053 (or 2044047 counting only the distinct ones).

The product of its (nonzero) digits is 1166400, while the sum is 54.

The square root of 551889990 is about 23492.3389640112. The cubic root of 551889990 is about 820.2586879639.

The spelling of 551889990 in words is "five hundred fifty-one million, eight hundred eighty-nine thousand, nine hundred ninety".