212724028 has 24 divisors (see below), whose sum is σ = 412997760. Its totient is φ = 95052720.

The previous prime is 212724013. The next prime is 212724049. The reversal of 212724028 is 820427212.

It is a junction number, because it is equal to n+sod(n) for n = 212723987 and 212724005.

It is a congruent number.

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, 38376 + ... + 43567.

It is an arithmetic number, because the mean of its divisors is an integer number (17208240).

Almost surely, 2^212724028 is an apocalyptic number.

It is an amenable number.

212724028 is a deficient number, since it is larger than the sum of its proper divisors (200273732).

212724028 is a wasteful number, since it uses less digits than its factorization.

212724028 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 82017 (or 82015 counting only the distinct ones).

The product of its (nonzero) digits is 3584, while the sum is 28.

The square root of 212724028 is about 14585.0618099479. The cubic root of 212724028 is about 596.9512271386.

The spelling of 212724028 in words is "two hundred twelve million, seven hundred twenty-four thousand, twenty-eight".