1028355551 has 16 divisors (see below), whose sum is σ = 1106602560. Its totient is φ = 952143360.

The previous prime is 1028355539. The next prime is 1028355569. The reversal of 1028355551 is 1555538201.

It is a cyclic number.

It is not a de Polignac number, because 1028355551 - 2²² = 1024161247 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1028355151) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 961445 + ... + 962513.

It is an arithmetic number, because the mean of its divisors is an integer number (69162660).

Almost surely, 2^1028355551 is an apocalyptic number.

1028355551 is a deficient number, since it is larger than the sum of its proper divisors (78247009).

1028355551 is a wasteful number, since it uses less digits than its factorization.

1028355551 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1954.

The product of its (nonzero) digits is 30000, while the sum is 35.

The square root of 1028355551 is about 32067.9832699220. The cubic root of 1028355551 is about 1009.3638941367.

The spelling of 1028355551 in words is "one billion, twenty-eight million, three hundred fifty-five thousand, five hundred fifty-one".