928891381 has 4 divisors (see below), whose sum is σ = 1013336064. Its totient is φ = 844446700.

The previous prime is 928891357. The next prime is 928891433. The reversal of 928891381 is 183198829.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 928891381 - 2⁹ = 928890869 is a prime.

It is a super-2 number, since 2×928891381² = 1725678395392174322, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (928891321) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 42222325 + ... + 42222346.

It is an arithmetic number, because the mean of its divisors is an integer number (253334016).

Almost surely, 2^928891381 is an apocalyptic number.

It is an amenable number.

928891381 is a deficient number, since it is larger than the sum of its proper divisors (84444683).

928891381 is a wasteful number, since it uses less digits than its factorization.

928891381 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 84444682.

The product of its digits is 248832, while the sum is 49.

The square root of 928891381 is about 30477.7194192741. The cubic root of 928891381 is about 975.7119957381.

The spelling of 928891381 in words is "nine hundred twenty-eight million, eight hundred ninety-one thousand, three hundred eighty-one".