264685240 has 64 divisors (see below), whose sum is σ = 633355200. Its totient is φ = 99207168.

The previous prime is 264685237. The next prime is 264685243. The reversal of 264685240 is 42586462.

It is an interprime number because it is at equal distance from previous prime (264685237) and next prime (264685243).

It is a self number, because there is not a number n which added to its sum of digits gives 264685240.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (264685243) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 182197 + ... + 183643.

It is an arithmetic number, because the mean of its divisors is an integer number (9896175).

Almost surely, 2^264685240 is an apocalyptic number.

264685240 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 264685240, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (316677600).

264685240 is an abundant number, since it is smaller than the sum of its proper divisors (368669960).

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

264685240 is a wasteful number, since it uses less digits than its factorization.

264685240 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1744 (or 1740 counting only the distinct ones).

The product of its (nonzero) digits is 92160, while the sum is 37.

The square root of 264685240 is about 16269.1499470624. The cubic root of 264685240 is about 642.0614195112.

The spelling of 264685240 in words is "two hundred sixty-four million, six hundred eighty-five thousand, two hundred forty".