891454212 has 36 divisors (see below), whose sum is σ = 2458253616. Its totient is φ = 270137520.

The previous prime is 891454169. The next prime is 891454219. The reversal of 891454212 is 212454198.

It is a tau number, because it is divible by the number of its divisors (36).

It is a super-2 number, since 2×891454212² = 1589381224185081888, which contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (36).

It is not an unprimeable number, because it can be changed into a prime (891454219) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 1125178 + ... + 1125969.

Almost surely, 2^891454212 is an apocalyptic number.

It is an amenable number.

891454212 is an abundant number, since it is smaller than the sum of its proper divisors (1566799404).

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

891454212 is a wasteful number, since it uses less digits than its factorization.

891454212 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2251168 (or 2251163 counting only the distinct ones).

The product of its digits is 23040, while the sum is 36.

The square root of 891454212 is about 29857.2304810744. The cubic root of 891454212 is about 962.4237841938.

The spelling of 891454212 in words is "eight hundred ninety-one million, four hundred fifty-four thousand, two hundred twelve".