891947742 has 32 divisors (see below), whose sum is σ = 2146041600. Its totient is φ = 241429248.

The previous prime is 891947737. The next prime is 891947801. The reversal of 891947742 is 247749198.

891947742 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 558067 + ... + 559662.

It is an arithmetic number, because the mean of its divisors is an integer number (67063800).

Almost surely, 2^891947742 is an apocalyptic number.

891947742 is an abundant number, since it is smaller than the sum of its proper divisors (1254093858).

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

891947742 is a wasteful number, since it uses less digits than its factorization.

891947742 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1117760.

The product of its digits is 1016064, while the sum is 51.

The square root of 891947742 is about 29865.4941696936. The cubic root of 891947742 is about 962.6013582357.

The spelling of 891947742 in words is "eight hundred ninety-one million, nine hundred forty-seven thousand, seven hundred forty-two".