1968887385 has 32 divisors (see below), whose sum is σ = 3706145280. Its totient is φ = 988303104.

The previous prime is 1968887381. The next prime is 1968887399. The reversal of 1968887385 is 5837888691.

It is not a de Polignac number, because 1968887385 - 2² = 1968887381 is a prime.

It is not an unprimeable number, because it can be changed into a prime (1968887381) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 426657 + ... + 431246.

It is an arithmetic number, because the mean of its divisors is an integer number (115817040).

Almost surely, 2^1968887385 is an apocalyptic number.

1968887385 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

It is an amenable number.

1968887385 is a deficient number, since it is larger than the sum of its proper divisors (1737257895).

1968887385 is a wasteful number, since it uses less digits than its factorization.

1968887385 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 857934 (or 857928 counting only the distinct ones).

The product of its digits is 23224320, while the sum is 63.

The square root of 1968887385 is about 44372.1464998032. The cubic root of 1968887385 is about 1253.3536365842.

The spelling of 1968887385 in words is "one billion, nine hundred sixty-eight million, eight hundred eighty-seven thousand, three hundred eighty-five".