1128821110 has 32 divisors (see below), whose sum is σ = 2055406752. Its totient is φ = 446319360.

The previous prime is 1128821081. The next prime is 1128821153. The reversal of 1128821110 is 111288211.

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, 655050 + ... + 656770.

It is an arithmetic number, because the mean of its divisors is an integer number (64231461).

Almost surely, 2^1128821110 is an apocalyptic number.

1128821110 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

1128821110 is a deficient number, since it is larger than the sum of its proper divisors (926585642).

1128821110 is a wasteful number, since it uses less digits than its factorization.

1128821110 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2448.

The product of its (nonzero) digits is 256, while the sum is 25.

The square root of 1128821110 is about 33597.9331209525. The cubic root of 1128821110 is about 1041.2180962974.

The spelling of 1128821110 in words is "one billion, one hundred twenty-eight million, eight hundred twenty-one thousand, one hundred ten".