212279808 has 80 divisors (see below), whose sum is σ = 609086016. Its totient is φ = 65310720.

The previous prime is 212279803. The next prime is 212279813. The reversal of 212279808 is 808972212.

It is an interprime number because it is at equal distance from previous prime (212279803) and next prime (212279813).

It is a Harshad number since it is a multiple of its sum of digits (39).

It is a nialpdrome in base 16.

It is not an unprimeable number, because it can be changed into a prime (212279801) 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, 14653 + ... + 25283.

Almost surely, 2^212279808 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 212279808, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (304543008).

212279808 is an abundant number, since it is smaller than the sum of its proper divisors (396806208).

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

212279808 is a wasteful number, since it uses less digits than its factorization.

212279808 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 10665 (or 10649 counting only the distinct ones).

The product of its (nonzero) digits is 32256, while the sum is 39.

The square root of 212279808 is about 14569.8252563303. The cubic root of 212279808 is about 596.5354106518.

The spelling of 212279808 in words is "two hundred twelve million, two hundred seventy-nine thousand, eight hundred eight".