2121790830 has 64 divisors (see below), whose sum is σ = 5189064768. Its totient is φ = 555161600.

The previous prime is 2121790807. The next prime is 2121790841. The reversal of 2121790830 is 380971212.

It is a super-3 number, since 3×2121790830³ (a number of 29 digits) contains 333 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 2121790791 and 2121790800.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 339292 + ... + 345488.

It is an arithmetic number, because the mean of its divisors is an integer number (81079137).

Almost surely, 2^2121790830 is an apocalyptic number.

2121790830 is an abundant number, since it is smaller than the sum of its proper divisors (3067273938).

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

2121790830 is a wasteful number, since it uses less digits than its factorization.

2121790830 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6421.

The product of its (nonzero) digits is 6048, while the sum is 33.

The square root of 2121790830 is about 46062.9007987990. The cubic root of 2121790830 is about 1284.9932786923.

The spelling of 2121790830 in words is "two billion, one hundred twenty-one million, seven hundred ninety thousand, eight hundred thirty".