212744730 has 64 divisors (see below), whose sum is σ = 558949248. Its totient is φ = 51394560.

The previous prime is 212744717. The next prime is 212744743. The reversal of 212744730 is 37447212.

212744730 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is an interprime number because it is at equal distance from previous prime (212744717) and next prime (212744743).

It is a Harshad number since it is a multiple of its sum of digits (30).

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 110254 + ... + 112166.

It is an arithmetic number, because the mean of its divisors is an integer number (8733582).

Almost surely, 2^212744730 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 212744730, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (279474624).

212744730 is an abundant number, since it is smaller than the sum of its proper divisors (346204518).

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

212744730 is a wasteful number, since it uses less digits than its factorization.

212744730 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2271.

The product of its (nonzero) digits is 9408, while the sum is 30.

The square root of 212744730 is about 14585.7714914227. The cubic root of 212744730 is about 596.9705913254.

The spelling of 212744730 in words is "two hundred twelve million, seven hundred forty-four thousand, seven hundred thirty".