212837730 has 64 divisors (see below), whose sum is σ = 590865408. Its totient is φ = 48058560.

The previous prime is 212837717. The next prime is 212837731. The reversal of 212837730 is 37738212.

It is a junction number, because it is equal to n+sod(n) for n = 212837691 and 212837700.

It is not an unprimeable number, because it can be changed into a prime (212837731) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 11325 + ... + 23535.

It is an arithmetic number, because the mean of its divisors is an integer number (9232272).

Almost surely, 2^212837730 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 212837730, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (295432704).

212837730 is an abundant number, since it is smaller than the sum of its proper divisors (378027678).

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

212837730 is a wasteful number, since it uses less digits than its factorization.

212837730 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 12311.

The product of its (nonzero) digits is 14112, while the sum is 33.

The square root of 212837730 is about 14588.9591815181. The cubic root of 212837730 is about 597.0575659469.

The spelling of 212837730 in words is "two hundred twelve million, eight hundred thirty-seven thousand, seven hundred thirty".