253489240 has 16 divisors (see below), whose sum is σ = 570350880. Its totient is φ = 101395680.

The previous prime is 253489237. The next prime is 253489253. The reversal of 253489240 is 42984352.

It is a happy number.

It is a self number, because there is not a number n which added to its sum of digits gives 253489240.

It is a congruent number.

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, 3168576 + ... + 3168655.

It is an arithmetic number, because the mean of its divisors is an integer number (35646930).

Almost surely, 2^253489240 is an apocalyptic number.

253489240 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

253489240 is an abundant number, since it is smaller than the sum of its proper divisors (316861640).

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

253489240 is a wasteful number, since it uses less digits than its factorization.

253489240 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6337242 (or 6337238 counting only the distinct ones).

The product of its (nonzero) digits is 69120, while the sum is 37.

The square root of 253489240 is about 15921.3454205353. The cubic root of 253489240 is about 632.8777727296.

The spelling of 253489240 in words is "two hundred fifty-three million, four hundred eighty-nine thousand, two hundred forty".