252444240 has 60 divisors (see below), whose sum is σ = 847794324. Its totient is φ = 67318272.

The previous prime is 252444233. The next prime is 252444259. The reversal of 252444240 is 42444252.

It can be written as a sum of positive squares in 2 ways, for example, as 153958464 + 98485776 = 12408^2 + 9924^2 .

It is a tau number, because it is divible by the number of its divisors (60).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 174589 + ... + 176028.

Almost surely, 2^252444240 is an apocalyptic number.

252444240 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

252444240 is an abundant number, since it is smaller than the sum of its proper divisors (595350084).

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

252444240 is a wasteful number, since it uses less digits than its factorization.

252444240 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 350636 (or 350627 counting only the distinct ones).

The product of its (nonzero) digits is 10240, while the sum is 27.

The square root of 252444240 is about 15888.4939500256. The cubic root of 252444240 is about 632.0069031986.

Adding to 252444240 its reverse (42444252), we get a palindrome (294888492).

It can be divided in two parts, 2524 and 44240, that added together give a palindrome (46764).

The spelling of 252444240 in words is "two hundred fifty-two million, four hundred forty-four thousand, two hundred forty".