891028630 has 16 divisors (see below), whose sum is σ = 1604358000. Its totient is φ = 356298912.

The previous prime is 891028627. The next prime is 891028631. The reversal of 891028630 is 36820198.

It is a self number, because there is not a number n which added to its sum of digits gives 891028630.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (891028631) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 24121 + ... + 48619.

It is an arithmetic number, because the mean of its divisors is an integer number (100272375).

Almost surely, 2^891028630 is an apocalyptic number.

891028630 is a deficient number, since it is larger than the sum of its proper divisors (713329370).

891028630 is a wasteful number, since it uses less digits than its factorization.

891028630 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 28143.

The product of its (nonzero) digits is 20736, while the sum is 37.

The square root of 891028630 is about 29850.1026798904. The cubic root of 891028630 is about 962.2706054773.

The spelling of 891028630 in words is "eight hundred ninety-one million, twenty-eight thousand, six hundred thirty".