891878892 has 12 divisors (see below), whose sum is σ = 2081050776. Its totient is φ = 297292960.

The previous prime is 891878891. The next prime is 891878917. The reversal of 891878892 is 298878198.

It is a tau number, because it is divible by the number of its divisors (12).

It is not an unprimeable number, because it can be changed into a prime (891878891) 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, 37161609 + ... + 37161632.

It is an arithmetic number, because the mean of its divisors is an integer number (173420898).

Almost surely, 2^891878892 is an apocalyptic number.

It is an amenable number.

891878892 is an abundant number, since it is smaller than the sum of its proper divisors (1189171884).

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

891878892 is a wasteful number, since it uses less digits than its factorization.

891878892 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 74323248 (or 74323246 counting only the distinct ones).

The product of its digits is 4644864, while the sum is 60.

The square root of 891878892 is about 29864.3414794299. The cubic root of 891878892 is about 962.5765896663.

The spelling of 891878892 in words is "eight hundred ninety-one million, eight hundred seventy-eight thousand, eight hundred ninety-two".