891918052 has 12 divisors (see below), whose sum is σ = 1561150780. Its totient is φ = 445874976.

The previous prime is 891918047. The next prime is 891918101. The reversal of 891918052 is 250819198.

891918052 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It can be written as a sum of positive squares in 2 ways, for example, as 231222436 + 660695616 = 15206^2 + 25704^2 .

It is a super-2 number, since 2×891918052² = 1591035622966949408, which contains 22 as substring.

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, 7018 + ... + 42814.

Almost surely, 2^891918052 is an apocalyptic number.

It is an amenable number.

891918052 is a deficient number, since it is larger than the sum of its proper divisors (669232728).

891918052 is a wasteful number, since it uses less digits than its factorization.

891918052 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 42030 (or 42028 counting only the distinct ones).

The product of its (nonzero) digits is 51840, while the sum is 43.

The square root of 891918052 is about 29864.9971036329. The cubic root of 891918052 is about 962.5906775086.

The spelling of 891918052 in words is "eight hundred ninety-one million, nine hundred eighteen thousand, fifty-two".