253616340 has 24 divisors (see below), whose sum is σ = 710125920. Its totient is φ = 67631008.

The previous prime is 253616317. The next prime is 253616357. The reversal of 253616340 is 43616352.

It is a Harshad number since it is a multiple of its sum of digits (30).

It is a junction number, because it is equal to n+sod(n) for n = 253616298 and 253616307.

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, 2113410 + ... + 2113529.

It is an arithmetic number, because the mean of its divisors is an integer number (29588580).

Almost surely, 2^253616340 is an apocalyptic number.

253616340 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

253616340 is an abundant number, since it is smaller than the sum of its proper divisors (456509580).

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

253616340 is a wasteful number, since it uses less digits than its factorization.

253616340 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4226951 (or 4226949 counting only the distinct ones).

The product of its (nonzero) digits is 12960, while the sum is 30.

The square root of 253616340 is about 15925.3364171687. The cubic root of 253616340 is about 632.9835304396.

The spelling of 253616340 in words is "two hundred fifty-three million, six hundred sixteen thousand, three hundred forty".