202388989 has 8 divisors (see below), whose sum is σ = 222743232. Its totient is φ = 182360640.

The previous prime is 202388947. The next prime is 202389037. The reversal of 202388989 is 989883202.

202388989 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 202388989 - 2¹⁹ = 201864701 is a prime.

It is a super-2 number, since 2×202388989² = 81922605736884242, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (202388489) 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, 80169 + ... + 82654.

It is an arithmetic number, because the mean of its divisors is an integer number (27842904).

Almost surely, 2^202388989 is an apocalyptic number.

It is an amenable number.

202388989 is a deficient number, since it is larger than the sum of its proper divisors (20354243).

202388989 is a wasteful number, since it uses less digits than its factorization.

202388989 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 162947.

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

The square root of 202388989 is about 14226.3484070931. The cubic root of 202388989 is about 587.1228195553.

The spelling of 202388989 in words is "two hundred two million, three hundred eighty-eight thousand, nine hundred eighty-nine".