212428390 has 8 divisors (see below), whose sum is σ = 382371120. Its totient is φ = 84971352.

The previous prime is 212428373. The next prime is 212428397. The reversal of 212428390 is 93824212.

212428390 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a nialpdrome in base 16.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (212428397) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 10621410 + ... + 10621429.

It is an arithmetic number, because the mean of its divisors is an integer number (47796390).

Almost surely, 2^212428390 is an apocalyptic number.

212428390 is a deficient number, since it is larger than the sum of its proper divisors (169942730).

212428390 is a wasteful number, since it uses less digits than its factorization.

212428390 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 21242846.

The product of its (nonzero) digits is 6912, while the sum is 31.

The square root of 212428390 is about 14574.9233274141. The cubic root of 212428390 is about 596.6745568002.

The spelling of 212428390 in words is "two hundred twelve million, four hundred twenty-eight thousand, three hundred ninety".