212403880 has 32 divisors (see below), whose sum is σ = 514672200. Its totient is φ = 78425856.

The previous prime is 212403853. The next prime is 212403901. The reversal of 212403880 is 88304212.

It can be written as a sum of positive squares in 4 ways, for example, as 95374756 + 117029124 = 9766^2 + 10818^2 .

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 203715 + ... + 204754.

Almost surely, 2^212403880 is an apocalyptic number.

212403880 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

212403880 is an abundant number, since it is smaller than the sum of its proper divisors (302268320).

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

212403880 is a wasteful number, since it uses less digits than its factorization.

212403880 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 408493 (or 408489 counting only the distinct ones).

The product of its (nonzero) digits is 3072, while the sum is 28.

The square root of 212403880 is about 14574.0824754082. The cubic root of 212403880 is about 596.6516078025.

The spelling of 212403880 in words is "two hundred twelve million, four hundred three thousand, eight hundred eighty".