207986540 has 36 divisors (see below), whose sum is σ = 460985616. Its totient is φ = 78813216.

The previous prime is 207986531. The next prime is 207986543. The reversal of 207986540 is 45689702.

It is not an unprimeable number, because it can be changed into a prime (207986543) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 7184 + ... + 21623.

It is an arithmetic number, because the mean of its divisors is an integer number (12805156).

Almost surely, 2^207986540 is an apocalyptic number.

207986540 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

207986540 is an abundant number, since it is smaller than the sum of its proper divisors (252999076).

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

207986540 is a wasteful number, since it uses less digits than its factorization.

207986540 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 28854 (or 28833 counting only the distinct ones).

The product of its (nonzero) digits is 120960, while the sum is 41.

The square root of 207986540 is about 14421.7384527664. The cubic root of 207986540 is about 592.4864328939.

The spelling of 207986540 in words is "two hundred seven million, nine hundred eighty-six thousand, five hundred forty".