253849856 has 72 divisors (see below), whose sum is σ = 552861120. Its totient is φ = 115623936.

The previous prime is 253849837. The next prime is 253849877. The reversal of 253849856 is 658948352.

It is a Smith number, since the sum of its digits (50) coincides with the sum of the digits of its prime factors.

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, 275765 + ... + 276683.

Almost surely, 2^253849856 is an apocalyptic number.

253849856 is a gapful number since it is divisible by the number (26) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 253849856, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (276430560).

253849856 is an abundant number, since it is smaller than the sum of its proper divisors (299011264).

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

253849856 is an equidigital number, since it uses as much as digits as its factorization.

253849856 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1031 (or 1017 counting only the distinct ones).

The product of its digits is 2073600, while the sum is 50.

The square root of 253849856 is about 15932.6663179770. Note that the first 3 decimals coincide. The cubic root of 253849856 is about 633.1777430044.

The spelling of 253849856 in words is "two hundred fifty-three million, eight hundred forty-nine thousand, eight hundred fifty-six".