212889280 has 28 divisors (see below), whose sum is σ = 506943360. Its totient is φ = 85155584.

The previous prime is 212889251. The next prime is 212889289. The reversal of 212889280 is 82988212.

It is a Harshad number since it is a multiple of its sum of digits (40).

It is not an unprimeable number, because it can be changed into a prime (212889289) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 332320 + ... + 332959.

It is an arithmetic number, because the mean of its divisors is an integer number (18105120).

Almost surely, 2^212889280 is an apocalyptic number.

212889280 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

212889280 is an abundant number, since it is smaller than the sum of its proper divisors (294054080).

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

212889280 is an equidigital number, since it uses as much as digits as its factorization.

212889280 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 665296 (or 665286 counting only the distinct ones).

The product of its (nonzero) digits is 36864, while the sum is 40.

The square root of 212889280 is about 14590.7258215621. The cubic root of 212889280 is about 597.1057651595.

The spelling of 212889280 in words is "two hundred twelve million, eight hundred eighty-nine thousand, two hundred eighty".