207983540 has 12 divisors (see below), whose sum is σ = 436765476. Its totient is φ = 83193408.

The previous prime is 207983533. The next prime is 207983579. The reversal of 207983540 is 45389702.

207983540 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It can be written as a sum of positive squares in 2 ways, for example, as 158055184 + 49928356 = 12572^2 + 7066^2 .

It is a junction number, because it is equal to n+sod(n) for n = 207983494 and 207983503.

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, 5199569 + ... + 5199608.

It is an arithmetic number, because the mean of its divisors is an integer number (36397123).

Almost surely, 2^207983540 is an apocalyptic number.

207983540 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

207983540 is an abundant number, since it is smaller than the sum of its proper divisors (228781936).

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

207983540 is a wasteful number, since it uses less digits than its factorization.

207983540 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 10399186 (or 10399184 counting only the distinct ones).

The product of its (nonzero) digits is 60480, while the sum is 38.

The square root of 207983540 is about 14421.6344427391. The cubic root of 207983540 is about 592.4835842034.

The spelling of 207983540 in words is "two hundred seven million, nine hundred eighty-three thousand, five hundred forty".