212428887 has 8 divisors (see below), whose sum is σ = 308987520. Its totient is φ = 128744760.

The previous prime is 212428871. The next prime is 212428891. The reversal of 212428887 is 788824212.

212428887 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 not a de Polignac number, because 212428887 - 2⁴ = 212428871 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (212428087) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 3218587 + ... + 3218652.

It is an arithmetic number, because the mean of its divisors is an integer number (38623440).

Almost surely, 2^212428887 is an apocalyptic number.

212428887 is a deficient number, since it is larger than the sum of its proper divisors (96558633).

212428887 is a wasteful number, since it uses less digits than its factorization.

212428887 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6437253.

The product of its digits is 114688, while the sum is 42.

The square root of 212428887 is about 14574.9403772365. The cubic root of 212428887 is about 596.6750221288.

The spelling of 212428887 in words is "two hundred twelve million, four hundred twenty-eight thousand, eight hundred eighty-seven".