19898404 has 24 divisors (see below), whose sum is σ = 37513728. Its totient is φ = 9208320.

The previous prime is 19898401. The next prime is 19898429. The reversal of 19898404 is 40489891.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (19898401) 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, 637 + ... + 6340.

It is an arithmetic number, because the mean of its divisors is an integer number (1563072).

Almost surely, 2^19898404 is an apocalyptic number.

It is an amenable number.

19898404 is a deficient number, since it is larger than the sum of its proper divisors (17615324).

19898404 is a wasteful number, since it uses less digits than its factorization.

19898404 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7035 (or 7033 counting only the distinct ones).

The product of its (nonzero) digits is 82944, while the sum is 43.

The square root of 19898404 is about 4460.7627150522. The cubic root of 19898404 is about 270.9813579039.

It can be divided in two parts, 19898 and 404, that added together give a palindrome (20302).

The spelling of 19898404 in words is "nineteen million, eight hundred ninety-eight thousand, four hundred four".