1004904640 has 56 divisors (see below), whose sum is σ = 2397721392. Its totient is φ = 401157120.

The previous prime is 1004904619. The next prime is 1004904643. The reversal of 1004904640 is 464094001.

It is a junction number, because it is equal to n+sod(n) for n = 1004904599 and 1004904608.

It is not an unprimeable number, because it can be changed into a prime (1004904643) 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, 172170 + ... + 177910.

Almost surely, 2^1004904640 is an apocalyptic number.

1004904640 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 1004904640, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1198860696).

1004904640 is an abundant number, since it is smaller than the sum of its proper divisors (1392816752).

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

1004904640 is an equidigital number, since it uses as much as digits as its factorization.

1004904640 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6305 (or 6295 counting only the distinct ones).

The product of its (nonzero) digits is 3456, while the sum is 28.

The square root of 1004904640 is about 31700.2309139855. The cubic root of 1004904640 is about 1001.6322144266.

Adding to 1004904640 its reverse (464094001), we get a palindrome (1468998641).

The spelling of 1004904640 in words is "one billion, four million, nine hundred four thousand, six hundred forty".