1916389888 has 40 divisors (see below), whose sum is σ = 4376050272. Its totient is φ = 821308416.

The previous prime is 1916389883. The next prime is 1916389973. The reversal of 1916389888 is 8889836191.

It is not an unprimeable number, because it can be changed into a prime (1916389883) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 263770 + ... + 270937.

Almost surely, 2^1916389888 is an apocalyptic number.

It is an amenable number.

1916389888 is an abundant number, since it is smaller than the sum of its proper divisors (2459660384).

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

1916389888 is an frugal number, since it uses more digits than its factorization.

1916389888 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 534732 (or 534716 counting only the distinct ones).

The product of its digits is 5971968, while the sum is 61.

The square root of 1916389888 is about 43776.5906392903. The cubic root of 1916389888 is about 1242.1135235403.

The spelling of 1916389888 in words is "one billion, nine hundred sixteen million, three hundred eighty-nine thousand, eight hundred eighty-eight".