212909238 has 12 divisors (see below), whose sum is σ = 461303388. Its totient is φ = 70969740.

The previous prime is 212909237. The next prime is 212909239. The reversal of 212909238 is 832909212.

It is an interprime number because it is at equal distance from previous prime (212909237) and next prime (212909239).

It is an alternating number because its digits alternate between even and odd.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (212909233) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 5914128 + ... + 5914163.

It is an arithmetic number, because the mean of its divisors is an integer number (38441949).

Almost surely, 2^212909238 is an apocalyptic number.

212909238 is an abundant number, since it is smaller than the sum of its proper divisors (248394150).

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

212909238 is a wasteful number, since it uses less digits than its factorization.

212909238 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 11828299 (or 11828296 counting only the distinct ones).

The product of its (nonzero) digits is 15552, while the sum is 36.

The square root of 212909238 is about 14591.4097331272. The cubic root of 212909238 is about 597.1244237857.

The spelling of 212909238 in words is "two hundred twelve million, nine hundred nine thousand, two hundred thirty-eight".