20440410 has 32 divisors (see below), whose sum is σ = 49654080. Its totient is φ = 5384448.

The previous prime is 20440397. The next prime is 20440421. The reversal of 20440410 is 1404402.

It is a Harshad number since it is a multiple of its sum of digits (15).

It is a self number, because there is not a number n which added to its sum of digits gives 20440410.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 1615 + ... + 6594.

It is an arithmetic number, because the mean of its divisors is an integer number (1551690).

Almost surely, 2^20440410 is an apocalyptic number.

20440410 is an abundant number, since it is smaller than the sum of its proper divisors (29213670).

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

20440410 is a wasteful number, since it uses less digits than its factorization.

20440410 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 8302.

The product of its (nonzero) digits is 128, while the sum is 15.

The square root of 20440410 is about 4521.1071652860. The cubic root of 20440410 is about 273.4197410072.

Adding to 20440410 its reverse (1404402), we get a palindrome (21844812).

The spelling of 20440410 in words is "twenty million, four hundred forty thousand, four hundred ten".