891380428 has 12 divisors (see below), whose sum is σ = 1560543712. Its totient is φ = 445510800.

The previous prime is 891380419. The next prime is 891380429. The reversal of 891380428 is 824083198.

It is a hoax number, since the sum of its digits (43) coincides with the sum of the digits of its distinct prime factors.

It is not an unprimeable number, because it can be changed into a prime (891380429) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 33348 + ... + 53803.

Almost surely, 2^891380428 is an apocalyptic number.

It is an amenable number.

891380428 is a deficient number, since it is larger than the sum of its proper divisors (669163284).

891380428 is a wasteful number, since it uses less digits than its factorization.

891380428 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 89712 (or 89710 counting only the distinct ones).

The product of its (nonzero) digits is 110592, while the sum is 43.

The square root of 891380428 is about 29855.9948419074. The cubic root of 891380428 is about 962.3972307882.

The spelling of 891380428 in words is "eight hundred ninety-one million, three hundred eighty thousand, four hundred twenty-eight".