268421989 has 8 divisors (see below), whose sum is σ = 295843968. Its totient is φ = 241503360.

The previous prime is 268421929. The next prime is 268422001. The reversal of 268421989 is 989124862.

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

It is a cyclic number.

It is not a de Polignac number, because 268421989 - 2¹⁵ = 268389221 is a prime.

It is a super-2 number, since 2×268421989² = 144100728357432242, which contains 22 as substring.

It is a Duffinian number.

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 (268421929) 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, 124717 + ... + 126850.

It is an arithmetic number, because the mean of its divisors is an integer number (36980496).

Almost surely, 2^268421989 is an apocalyptic number.

It is an amenable number.

268421989 is a deficient number, since it is larger than the sum of its proper divisors (27421979).

268421989 is a wasteful number, since it uses less digits than its factorization.

268421989 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 251675.

The product of its digits is 497664, while the sum is 49.

The square root of 268421989 is about 16383.5890146207. The cubic root of 268421989 is about 645.0687898109.

The spelling of 268421989 in words is "two hundred sixty-eight million, four hundred twenty-one thousand, nine hundred eighty-nine".