1207305640 has 16 divisors (see below), whose sum is σ = 2716437780. Its totient is φ = 482922240.

The previous prime is 1207305607. The next prime is 1207305667. The reversal of 1207305640 is 465037021.

It can be written as a sum of positive squares in 2 ways, for example, as 976812516 + 230493124 = 31254^2 + 15182^2 .

It is a junction number, because it is equal to n+sod(n) for n = 1207305599 and 1207305608.

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, 15091281 + ... + 15091360.

Almost surely, 2^1207305640 is an apocalyptic number.

1207305640 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

1207305640 is an abundant number, since it is smaller than the sum of its proper divisors (1509132140).

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

1207305640 is a wasteful number, since it uses less digits than its factorization.

1207305640 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 30182652 (or 30182648 counting only the distinct ones).

The product of its (nonzero) digits is 5040, while the sum is 28.

The square root of 1207305640 is about 34746.3039761066. The cubic root of 1207305640 is about 1064.8107079063.

The spelling of 1207305640 in words is "one billion, two hundred seven million, three hundred five thousand, six hundred forty".