1138895928 has 48 divisors (see below), whose sum is σ = 3095944800. Its totient is φ = 378224640.

The previous prime is 1138895903. The next prime is 1138895941. The reversal of 1138895928 is 8295988311.

1138895928 is a `hidden beast` number, since 11 + 38 + 8 + 9 + 592 + 8 = 666.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 9673 + ... + 48696.

It is an arithmetic number, because the mean of its divisors is an integer number (64498850).

Almost surely, 2^1138895928 is an apocalyptic number.

1138895928 is a gapful number since it is divisible by the number (18) formed by its first and last digit.

It is an amenable number.

1138895928 is an abundant number, since it is smaller than the sum of its proper divisors (1957048872).

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

1138895928 is a wasteful number, since it uses less digits than its factorization.

1138895928 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 58652 (or 58645 counting only the distinct ones).

The product of its digits is 1244160, while the sum is 54.

The square root of 1138895928 is about 33747.5321764422. The cubic root of 1138895928 is about 1044.3065775101.

The spelling of 1138895928 in words is "one billion, one hundred thirty-eight million, eight hundred ninety-five thousand, nine hundred twenty-eight".