1005225640 has 32 divisors (see below), whose sum is σ = 2394803880. Its totient is φ = 378437632.

The previous prime is 1005225619. The next prime is 1005225653. The reversal of 1005225640 is 465225001.

It can be written as a sum of positive squares in 4 ways, for example, as 739731204 + 265494436 = 27198^2 + 16294^2 .

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, 738457 + ... + 739816.

Almost surely, 2^1005225640 is an apocalyptic number.

1005225640 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

1005225640 is an abundant number, since it is smaller than the sum of its proper divisors (1389578240).

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

1005225640 is a wasteful number, since it uses less digits than its factorization.

1005225640 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1478301 (or 1478297 counting only the distinct ones).

The product of its (nonzero) digits is 2400, while the sum is 25.

The square root of 1005225640 is about 31705.2935643246. The cubic root of 1005225640 is about 1001.7388546320.

The spelling of 1005225640 in words is "one billion, five million, two hundred twenty-five thousand, six hundred forty".