891154428 has 48 divisors (see below), whose sum is σ = 2104295424. Its totient is φ = 293509440.

The previous prime is 891154417. The next prime is 891154447. The reversal of 891154428 is 824451198.

It is a self number, because there is not a number n which added to its sum of digits gives 891154428.

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, 421093 + ... + 423203.

It is an arithmetic number, because the mean of its divisors is an integer number (43839488).

Almost surely, 2^891154428 is an apocalyptic number.

It is an amenable number.

891154428 is an abundant number, since it is smaller than the sum of its proper divisors (1213140996).

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

891154428 is a wasteful number, since it uses less digits than its factorization.

891154428 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2522 (or 2520 counting only the distinct ones).

The product of its digits is 92160, while the sum is 42.

The square root of 891154428 is about 29852.2097674527. The cubic root of 891154428 is about 962.3158887291.

The spelling of 891154428 in words is "eight hundred ninety-one million, one hundred fifty-four thousand, four hundred twenty-eight".