1005404340 has 24 divisors (see below), whose sum is σ = 2815132320. Its totient is φ = 268107808.

The previous prime is 1005404339. The next prime is 1005404377. The reversal of 1005404340 is 434045001.

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, 8378310 + ... + 8378429.

It is an arithmetic number, because the mean of its divisors is an integer number (117297180).

Almost surely, 2^1005404340 is an apocalyptic number.

1005404340 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

1005404340 is an abundant number, since it is smaller than the sum of its proper divisors (1809727980).

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

1005404340 is a wasteful number, since it uses less digits than its factorization.

1005404340 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 16756751 (or 16756749 counting only the distinct ones).

The product of its (nonzero) digits is 960, while the sum is 21.

The square root of 1005404340 is about 31708.1115804773. Note that the first 3 decimals coincide. The cubic root of 1005404340 is about 1001.7982111651.

Adding to 1005404340 its reverse (434045001), we get a palindrome (1439449341).

The spelling of 1005404340 in words is "one billion, five million, four hundred four thousand, three hundred forty".