214428906 has 24 divisors (see below), whose sum is σ = 467943840. Its totient is φ = 70961256.

The previous prime is 214428901. The next prime is 214428911. The reversal of 214428906 is 609824412.

It is an interprime number because it is at equal distance from previous prime (214428901) and next prime (214428911).

It is not an unprimeable number, because it can be changed into a prime (214428901) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 40350 + ... + 45353.

It is an arithmetic number, because the mean of its divisors is an integer number (19497660).

Almost surely, 2^214428906 is an apocalyptic number.

214428906 is an abundant number, since it is smaller than the sum of its proper divisors (253514934).

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

214428906 is a wasteful number, since it uses less digits than its factorization.

214428906 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 85850 (or 85847 counting only the distinct ones).

The product of its (nonzero) digits is 27648, while the sum is 36.

The square root of 214428906 is about 14643.3912055917. The cubic root of 214428906 is about 598.5417420107.

The spelling of 214428906 in words is "two hundred fourteen million, four hundred twenty-eight thousand, nine hundred six".