2143920 has 40 divisors (see below), whose sum is σ = 6646896. Its totient is φ = 571648.

The previous prime is 2143909. The next prime is 2143943. The reversal of 2143920 is 293412.

It is a tau number, because it is divible by the number of its divisors (40).

It is an Ulam number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 4227 + ... + 4706.

2^2143920 is an apocalyptic number.

2143920 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

2143920 is an abundant number, since it is smaller than the sum of its proper divisors (4502976).

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

2143920 is a wasteful number, since it uses less digits than its factorization.

2143920 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 8949 (or 8943 counting only the distinct ones).

The product of its (nonzero) digits is 432, while the sum is 21.

The square root of 2143920 is about 1464.2130992448. The cubic root of 2143920 is about 128.9445107180.

The spelling of 2143920 in words is "two million, one hundred forty-three thousand, nine hundred twenty".