1004440020 has 24 divisors (see below), whose sum is σ = 2812432224. Its totient is φ = 267850656.

The previous prime is 1004440007. The next prime is 1004440033. The reversal of 1004440020 is 200444001.

It is an interprime number because it is at equal distance from previous prime (1004440007) and next prime (1004440033).

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

It is a congruent number.

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, 8370274 + ... + 8370393.

It is an arithmetic number, because the mean of its divisors is an integer number (117184676).

Almost surely, 2^1004440020 is an apocalyptic number.

1004440020 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

1004440020 is an abundant number, since it is smaller than the sum of its proper divisors (1807992204).

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

1004440020 is a wasteful number, since it uses less digits than its factorization.

1004440020 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 16740679 (or 16740677 counting only the distinct ones).

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

The square root of 1004440020 is about 31692.9017289361. The cubic root of 1004440020 is about 1001.4778216341.

Adding to 1004440020 its reverse (200444001), we get a palindrome (1204884021).

The spelling of 1004440020 in words is "one billion, four million, four hundred forty thousand, twenty".