2129830 has 16 divisors (see below), whose sum is σ = 3850704. Its totient is φ = 848160.

The previous prime is 2129821. The next prime is 2129837. The reversal of 2129830 is 389212.

It is an alternating number because its digits alternate between even and odd.

It is a junction number, because it is equal to n+sod(n) for n = 2129795 and 2129804.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2129837) 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, 3445 + ... + 4015.

It is an arithmetic number, because the mean of its divisors is an integer number (240669).

2^2129830 is an apocalyptic number.

2129830 is a deficient number, since it is larger than the sum of its proper divisors (1720874).

2129830 is a wasteful number, since it uses less digits than its factorization.

2129830 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 951.

The product of its (nonzero) digits is 864, while the sum is 25.

The square root of 2129830 is about 1459.3937097302. The cubic root of 2129830 is about 128.6614120232.

The spelling of 2129830 in words is "two million, one hundred twenty-nine thousand, eight hundred thirty".