253980440 has 32 divisors (see below), whose sum is σ = 653093280. Its totient is φ = 87078912.

The previous prime is 253980437. The next prime is 253980479. The reversal of 253980440 is 44089352.

It is a Harshad number since it is a multiple of its sum of digits (35).

It is a self number, because there is not a number n which added to its sum of digits gives 253980440.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 453257 + ... + 453816.

It is an arithmetic number, because the mean of its divisors is an integer number (20409165).

Almost surely, 2^253980440 is an apocalyptic number.

253980440 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

253980440 is an abundant number, since it is smaller than the sum of its proper divisors (399112840).

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

253980440 is a wasteful number, since it uses less digits than its factorization.

253980440 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 907091 (or 907087 counting only the distinct ones).

The product of its (nonzero) digits is 34560, while the sum is 35.

The square root of 253980440 is about 15936.7637869173. The cubic root of 253980440 is about 633.2862962912.

The spelling of 253980440 in words is "two hundred fifty-three million, nine hundred eighty thousand, four hundred forty".