1928113187 has 16 divisors (see below), whose sum is σ = 2588796672. Its totient is φ = 1386853920.

The previous prime is 1928113171. The next prime is 1928113223. The reversal of 1928113187 is 7813118291.

It is a cyclic number.

It is not a de Polignac number, because 1928113187 - 2⁴ = 1928113171 is a prime.

It is not an unprimeable number, because it can be changed into a prime (1928113127) 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, 962093 + ... + 964094.

It is an arithmetic number, because the mean of its divisors is an integer number (161799792).

Almost surely, 2^1928113187 is an apocalyptic number.

1928113187 is a deficient number, since it is larger than the sum of its proper divisors (660683485).

1928113187 is a wasteful number, since it uses less digits than its factorization.

1928113187 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1926218.

The product of its digits is 24192, while the sum is 41.

The square root of 1928113187 is about 43910.2856629287. The cubic root of 1928113187 is about 1244.6412060511.

The spelling of 1928113187 in words is "one billion, nine hundred twenty-eight million, one hundred thirteen thousand, one hundred eighty-seven".