2123405880 has 32 divisors (see below), whose sum is σ = 6370218000. Its totient is φ = 566241536.

The previous prime is 2123405831. The next prime is 2123405887. The reversal of 2123405880 is 885043212.

It is a super-3 number, since 3×2123405880³ (a number of 29 digits) contains 333 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2123405887) 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, 8847405 + ... + 8847644.

Almost surely, 2^2123405880 is an apocalyptic number.

2123405880 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

2123405880 is an abundant number, since it is smaller than the sum of its proper divisors (4246812120).

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

2123405880 is a wasteful number, since it uses less digits than its factorization.

2123405880 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 17695063 (or 17695059 counting only the distinct ones).

The product of its (nonzero) digits is 15360, while the sum is 33.

The square root of 2123405880 is about 46080.4283834254. The cubic root of 2123405880 is about 1285.3192300893.

The spelling of 2123405880 in words is "two billion, one hundred twenty-three million, four hundred five thousand, eight hundred eighty".