20098440 has 48 divisors (see below), whose sum is σ = 65321100. Its totient is φ = 5359488.

The previous prime is 20098439. The next prime is 20098451. The reversal of 20098440 is 4489002.

It can be written as a sum of positive squares in 2 ways, for example, as 19873764 + 224676 = 4458^2 + 474^2 .

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 27555 + ... + 28274.

Almost surely, 2^20098440 is an apocalyptic number.

20098440 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

20098440 is an abundant number, since it is smaller than the sum of its proper divisors (45222660).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

20098440 is a wasteful number, since it uses less digits than its factorization.

20098440 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 55846 (or 55839 counting only the distinct ones).

The product of its (nonzero) digits is 2304, while the sum is 27.

The square root of 20098440 is about 4483.1283720188. The cubic root of 20098440 is about 271.8863784378.

The spelling of 20098440 in words is "twenty million, ninety-eight thousand, four hundred forty".