1928495988 has 36 divisors (see below), whose sum is σ = 5032064128. Its totient is φ = 622095120.

The previous prime is 1928495917. The next prime is 1928495993. The reversal of 1928495988 is 8895948291.

1928495988 is a `hidden beast` number, since 19 + 28 + 4 + 9 + 598 + 8 = 666.

It is a tau number, because it is divible by the number of its divisors (36).

It is a super-2 number, since 2×1928495988² = 7438193551464192288, which contains 22 as substring.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 862906 + ... + 865137.

Almost surely, 2^1928495988 is an apocalyptic number.

1928495988 is a gapful number since it is divisible by the number (18) formed by its first and last digit.

It is an amenable number.

1928495988 is an abundant number, since it is smaller than the sum of its proper divisors (3103568140).

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

1928495988 is a wasteful number, since it uses less digits than its factorization.

1928495988 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1728084 (or 1728079 counting only the distinct ones).

The product of its digits is 14929920, while the sum is 63.

The square root of 1928495988 is about 43914.6443455939. The cubic root of 1928495988 is about 1244.7235695372.

The spelling of 1928495988 in words is "one billion, nine hundred twenty-eight million, four hundred ninety-five thousand, nine hundred eighty-eight".