202106404 has 24 divisors (see below), whose sum is σ = 375028920. Its totient is φ = 94972416.

The previous prime is 202106357. The next prime is 202106441. The reversal of 202106404 is 404601202.

202106404 is digitally balanced in base 3, because in such base it contains all the possibile digits an equal number of times.

It can be written as a sum of positive squares in 4 ways, for example, as 149572900 + 52533504 = 12230^2 + 7248^2 .

It is a super-2 number, since 2×202106404² = 81693997075622432, which contains 22 as substring.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 57942 + ... + 61330.

It is an arithmetic number, because the mean of its divisors is an integer number (15626205).

Almost surely, 2^202106404 is an apocalyptic number.

It is an amenable number.

202106404 is a deficient number, since it is larger than the sum of its proper divisors (172922516).

202106404 is a wasteful number, since it uses less digits than its factorization.

202106404 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4287 (or 4285 counting only the distinct ones).

The product of its (nonzero) digits is 384, while the sum is 19.

The square root of 202106404 is about 14216.4131903937. The cubic root of 202106404 is about 586.8494361385.

Adding to 202106404 its reverse (404601202), we get a palindrome (606707606).

The spelling of 202106404 in words is "two hundred two million, one hundred six thousand, four hundred four".