264257780 has 24 divisors (see below), whose sum is σ = 555691752. Its totient is φ = 105560192.

The previous prime is 264257767. The next prime is 264257789. The reversal of 264257780 is 87752462.

It can be written as a sum of positive squares in 4 ways, for example, as 1752976 + 262504804 = 1324^2 + 16202^2 .

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (264257789) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 6914 + ... + 24006.

It is an arithmetic number, because the mean of its divisors is an integer number (23153823).

Almost surely, 2^264257780 is an apocalyptic number.

264257780 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

264257780 is an abundant number, since it is smaller than the sum of its proper divisors (291433972).

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

264257780 is a wasteful number, since it uses less digits than its factorization.

264257780 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 17875 (or 17873 counting only the distinct ones).

The product of its (nonzero) digits is 188160, while the sum is 41.

The square root of 264257780 is about 16256.0075049195. The cubic root of 264257780 is about 641.7155956018.

The spelling of 264257780 in words is "two hundred sixty-four million, two hundred fifty-seven thousand, seven hundred eighty".