891281478 has 8 divisors (see below), whose sum is σ = 1782562968. Its totient is φ = 297093824.

The previous prime is 891281471. The next prime is 891281497. The reversal of 891281478 is 874182198.

891281478 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a sphenic number, since it is the product of 3 distinct primes.

891281478 is an admirable number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (891281471) 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, 74273451 + ... + 74273462.

It is an arithmetic number, because the mean of its divisors is an integer number (222820371).

Almost surely, 2^891281478 is an apocalyptic number.

891281478 is a primitive abundant number, since it is smaller than the sum of its proper divisors, none of which is abundant.

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

891281478 is a wasteful number, since it uses less digits than its factorization.

891281478 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 148546918.

The product of its digits is 258048, while the sum is 48.

The square root of 891281478 is about 29854.3376747835. The cubic root of 891281478 is about 962.3616183356.

The spelling of 891281478 in words is "eight hundred ninety-one million, two hundred eighty-one thousand, four hundred seventy-eight".