2123980 has 24 divisors (see below), whose sum is σ = 4723488. Its totient is φ = 799488.

The previous prime is 2123971. The next prime is 2123983. The reversal of 2123980 is 893212.

It is a super-2 number, since 2×2123980² = 9022582080800, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (2123983) 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, 2784 + ... + 3463.

It is an arithmetic number, because the mean of its divisors is an integer number (196812).

2^2123980 is an apocalyptic number.

2123980 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

2123980 is an abundant number, since it is smaller than the sum of its proper divisors (2599508).

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

2123980 is a wasteful number, since it uses less digits than its factorization.

2123980 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6273 (or 6271 counting only the distinct ones).

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

The square root of 2123980 is about 1457.3880746047. The cubic root of 2123980 is about 128.5435059881.

The spelling of 2123980 in words is "two million, one hundred twenty-three thousand, nine hundred eighty".