551990428 has 12 divisors (see below), whose sum is σ = 1053799992. Its totient is φ = 250904720.

The previous prime is 551990407. The next prime is 551990443. The reversal of 551990428 is 824099155.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 6272575 + ... + 6272662.

It is an arithmetic number, because the mean of its divisors is an integer number (87816666).

Almost surely, 2^551990428 is an apocalyptic number.

It is an amenable number.

551990428 is a deficient number, since it is larger than the sum of its proper divisors (501809564).

551990428 is a wasteful number, since it uses less digits than its factorization.

551990428 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 12545252 (or 12545250 counting only the distinct ones).

The product of its (nonzero) digits is 129600, while the sum is 43.

The square root of 551990428 is about 23494.4765423705. The cubic root of 551990428 is about 820.3084443443.

The spelling of 551990428 in words is "five hundred fifty-one million, nine hundred ninety thousand, four hundred twenty-eight".