264243980 has 192 divisors, whose sum is σ = 760015872. Its totient is φ = 74511360.

The previous prime is 264243979. The next prime is 264243997. The reversal of 264243980 is 89342462.

It is a happy number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 1341242 + ... + 1341438.

It is an arithmetic number, because the mean of its divisors is an integer number (3958416).

Almost surely, 2^264243980 is an apocalyptic number.

264243980 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 264243980, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (380007936).

264243980 is an abundant number, since it is smaller than the sum of its proper divisors (495771892).

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

264243980 is a wasteful number, since it uses less digits than its factorization.

264243980 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 304 (or 302 counting only the distinct ones).

The product of its (nonzero) digits is 82944, while the sum is 38.

The square root of 264243980 is about 16255.5830409124. The cubic root of 264243980 is about 641.7044249065.

The spelling of 264243980 in words is "two hundred sixty-four million, two hundred forty-three thousand, nine hundred eighty".