1205640304 has 20 divisors (see below), whose sum is σ = 2548285560. Its totient is φ = 548018240.

The previous prime is 1205640299. The next prime is 1205640341. The reversal of 1205640304 is 4030465021.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 3424939 + ... + 3425290.

It is an arithmetic number, because the mean of its divisors is an integer number (127414278).

Almost surely, 2^1205640304 is an apocalyptic number.

It is an amenable number.

1205640304 is an abundant number, since it is smaller than the sum of its proper divisors (1342645256).

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

1205640304 is a wasteful number, since it uses less digits than its factorization.

1205640304 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6850248 (or 6850242 counting only the distinct ones).

The product of its (nonzero) digits is 2880, while the sum is 25.

The square root of 1205640304 is about 34722.3314885392. The cubic root of 1205640304 is about 1064.3208889492.

The spelling of 1205640304 in words is "one billion, two hundred five million, six hundred forty thousand, three hundred four".