539566640 has 20 divisors (see below), whose sum is σ = 1254492624. Its totient is φ = 215826624.

The previous prime is 539566631. The next prime is 539566661. The reversal of 539566640 is 46665935.

It is a tau number, because it is divible by the number of its divisors (20).

It is a super-2 number, since 2×539566640² = 582264318001779200, which contains 22 as substring.

It is a hoax number, since the sum of its digits (44) coincides with the sum of the digits of its distinct prime factors.

It is a junction number, because it is equal to n+sod(n) for n = 539566591 and 539566600.

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, 3372212 + ... + 3372371.

Almost surely, 2^539566640 is an apocalyptic number.

It is an amenable number.

539566640 is an abundant number, since it is smaller than the sum of its proper divisors (714925984).

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

539566640 is a wasteful number, since it uses less digits than its factorization.

539566640 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6744596 (or 6744590 counting only the distinct ones).

The product of its (nonzero) digits is 583200, while the sum is 44.

The square root of 539566640 is about 23228.5737831663. The cubic root of 539566640 is about 814.1073896393.

The spelling of 539566640 in words is "five hundred thirty-nine million, five hundred sixty-six thousand, six hundred forty".