212838330 has 16 divisors (see below), whose sum is σ = 510812064. Its totient is φ = 56756880.

The previous prime is 212838299. The next prime is 212838371. The reversal of 212838330 is 33838212.

It is a Harshad number since it is a multiple of its sum of digits (30), and also a Moran number because the ratio is a prime number: 7094611 = 212838330 / (2 + 1 + 2 + 8 + 3 + 8 + 3 + 3 + 0).

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, 3547276 + ... + 3547335.

It is an arithmetic number, because the mean of its divisors is an integer number (31925754).

Almost surely, 2^212838330 is an apocalyptic number.

212838330 is an abundant number, since it is smaller than the sum of its proper divisors (297973734).

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

212838330 is a wasteful number, since it uses less digits than its factorization.

212838330 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7094621.

The product of its (nonzero) digits is 6912, while the sum is 30.

The square root of 212838330 is about 14588.9797449993. The cubic root of 212838330 is about 597.0581269912.

The spelling of 212838330 in words is "two hundred twelve million, eight hundred thirty-eight thousand, three hundred thirty".