891891054 has 32 divisors (see below), whose sum is σ = 1995300000. Its totient is φ = 295299072.

The previous prime is 891891053. The next prime is 891891059. The reversal of 891891054 is 450198198.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (891891053) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 47379 + ... + 63470.

It is an arithmetic number, because the mean of its divisors is an integer number (62353125).

Almost surely, 2^891891054 is an apocalyptic number.

891891054 is an abundant number, since it is smaller than the sum of its proper divisors (1103408946).

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

891891054 is a wasteful number, since it uses less digits than its factorization.

891891054 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 111009 (or 111003 counting only the distinct ones).

The product of its (nonzero) digits is 103680, while the sum is 45.

The square root of 891891054 is about 29864.5450994988. The cubic root of 891891054 is about 962.5809649999.

The spelling of 891891054 in words is "eight hundred ninety-one million, eight hundred ninety-one thousand, fifty-four".