1900889856 has 108 divisors (see below), whose sum is σ = 5683910232. Its totient is φ = 633609216.

The previous prime is 1900889849. The next prime is 1900889909. The reversal of 1900889856 is 6589880091.

It is a tau number, because it is divible by the number of its divisors (108).

It is a super-2 number, since 2×1900889856² = 7226764489287401472, which contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (54).

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, 46930 + ... + 77486.

Almost surely, 2^1900889856 is an apocalyptic number.

1900889856 is a gapful number since it is divisible by the number (16) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 1900889856, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (2841955116).

1900889856 is an abundant number, since it is smaller than the sum of its proper divisors (3783020376).

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

1900889856 is an frugal number, since it uses more digits than its factorization.

1900889856 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 30588 (or 30562 counting only the distinct ones).

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

The square root of 1900889856 is about 43599.1955889097. The cubic root of 1900889856 is about 1238.7556577186.

The spelling of 1900889856 in words is "one billion, nine hundred million, eight hundred eighty-nine thousand, eight hundred fifty-six".