1889693656 has 16 divisors (see below), whose sum is σ = 3618563040. Its totient is φ = 924743520.

The previous prime is 1889693647. The next prime is 1889693669. The reversal of 1889693656 is 6563969881.

It is a super-2 number, since 2×1889693656² = 7141884227053292672, which contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 1889693594 and 1889693603.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 2512515 + ... + 2513266.

It is an arithmetic number, because the mean of its divisors is an integer number (226160190).

Almost surely, 2^1889693656 is an apocalyptic number.

It is an amenable number.

1889693656 is a deficient number, since it is larger than the sum of its proper divisors (1728869384).

1889693656 is a wasteful number, since it uses less digits than its factorization.

1889693656 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5025834 (or 5025830 counting only the distinct ones).

The product of its digits is 16796160, while the sum is 61.

The square root of 1889693656 is about 43470.6068050585. The cubic root of 1889693656 is about 1236.3187857498.

The spelling of 1889693656 in words is "one billion, eight hundred eighty-nine million, six hundred ninety-three thousand, six hundred fifty-six".