971889228 has 18 divisors (see below), whose sum is σ = 2456720084. Its totient is φ = 323963064.

The previous prime is 971889221. The next prime is 971889229. The reversal of 971889228 is 822988179.

It is a tau number, because it is divible by the number of its divisors (18).

It is not an unprimeable number, because it can be changed into a prime (971889221) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 13498426 + ... + 13498497.

Almost surely, 2^971889228 is an apocalyptic number.

It is an amenable number.

971889228 is an abundant number, since it is smaller than the sum of its proper divisors (1484830856).

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

971889228 is a wasteful number, since it uses less digits than its factorization.

971889228 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 26996933 (or 26996928 counting only the distinct ones).

The product of its digits is 1161216, while the sum is 54.

The square root of 971889228 is about 31175.1379788446. The cubic root of 971889228 is about 990.5405434976.

The spelling of 971889228 in words is "nine hundred seventy-one million, eight hundred eighty-nine thousand, two hundred twenty-eight".