253401040 has 20 divisors (see below), whose sum is σ = 589157604. Its totient is φ = 101360384.

The previous prime is 253401007. The next prime is 253401041. The reversal of 253401040 is 40104352.

It can be written as a sum of positive squares in 2 ways, for example, as 31629376 + 221771664 = 5624^2 + 14892^2 .

It is a tau number, because it is divible by the number of its divisors (20).

It is a junction number, because it is equal to n+sod(n) for n = 253400999 and 253401017.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (253401041) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1583677 + ... + 1583836.

Almost surely, 2^253401040 is an apocalyptic number.

253401040 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

253401040 is an abundant number, since it is smaller than the sum of its proper divisors (335756564).

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

253401040 is a wasteful number, since it uses less digits than its factorization.

253401040 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3167526 (or 3167520 counting only the distinct ones).

The product of its (nonzero) digits is 480, while the sum is 19.

The square root of 253401040 is about 15918.5753131365. The cubic root of 253401040 is about 632.8043622568.

Adding to 253401040 its reverse (40104352), we get a palindrome (293505392).

The spelling of 253401040 in words is "two hundred fifty-three million, four hundred one thousand, forty".