921030000 has 200 divisors, whose sum is σ = 3244661376. Its totient is φ = 223200000.

The previous prime is 921029969. The next prime is 921030023. The reversal of 921030000 is 30129.

It is a tau number, because it is divible by the number of its divisors (200).

It is a Harshad number since it is a multiple of its sum of digits (15).

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 39 ways as a sum of consecutive naturals, for example, 328605 + ... + 331395.

Almost surely, 2^921030000 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 921030000, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1622330688).

921030000 is an abundant number, since it is smaller than the sum of its proper divisors (2323631376).

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

921030000 is a wasteful number, since it uses less digits than its factorization.

921030000 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2833 (or 2812 counting only the distinct ones).

The product of its (nonzero) digits is 54, while the sum is 15.

The square root of 921030000 is about 30348.4760737669. The cubic root of 921030000 is about 972.9516497246.

Adding to 921030000 its reverse (30129), we get a palindrome (921060129).

The spelling of 921030000 in words is "nine hundred twenty-one million, thirty thousand".