213456988 has 24 divisors (see below), whose sum is σ = 391572720. Its totient is φ = 101700480.

The previous prime is 213456983. The next prime is 213457003. The reversal of 213456988 is 889654312.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (213456983) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 8083 + ... + 22186.

It is an arithmetic number, because the mean of its divisors is an integer number (16315530).

Almost surely, 2^213456988 is an apocalyptic number.

It is an amenable number.

213456988 is a deficient number, since it is larger than the sum of its proper divisors (178115732).

213456988 is a wasteful number, since it uses less digits than its factorization.

213456988 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 30357 (or 30355 counting only the distinct ones).

The product of its digits is 414720, while the sum is 46.

The square root of 213456988 is about 14610.1672817254. The cubic root of 213456988 is about 597.6360577863.

The spelling of 213456988 in words is "two hundred thirteen million, four hundred fifty-six thousand, nine hundred eighty-eight".