891949280 has 48 divisors (see below), whose sum is σ = 2109149280. Its totient is φ = 356454912.

The previous prime is 891949271. The next prime is 891949283. The reversal of 891949280 is 82949198.

It is a happy number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (891949283) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 255386 + ... + 258854.

It is an arithmetic number, because the mean of its divisors is an integer number (43940610).

Almost surely, 2^891949280 is an apocalyptic number.

891949280 is a gapful number since it is divisible by the number (80) formed by its first and last digit.

It is an amenable number.

891949280 is an abundant number, since it is smaller than the sum of its proper divisors (1217200000).

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

891949280 is a wasteful number, since it uses less digits than its factorization.

891949280 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5091 (or 5083 counting only the distinct ones).

The product of its (nonzero) digits is 373248, while the sum is 50.

The square root of 891949280 is about 29865.5199184612. The cubic root of 891949280 is about 962.6019115118.

The spelling of 891949280 in words is "eight hundred ninety-one million, nine hundred forty-nine thousand, two hundred eighty".