253403826 has 64 divisors (see below), whose sum is σ = 557746560. Its totient is φ = 76285440.

The previous prime is 253403807. The next prime is 253403851. The reversal of 253403826 is 628304352.

It is a happy number.

253403826 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 1200861 + ... + 1201071.

It is an arithmetic number, because the mean of its divisors is an integer number (8714790).

Almost surely, 2^253403826 is an apocalyptic number.

253403826 is a gapful number since it is divisible by the number (26) formed by its first and last digit.

It is a practical number, because each smaller number is the sum of distinct divisors of 253403826, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (278873280).

253403826 is an abundant number, since it is smaller than the sum of its proper divisors (304342734).

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

253403826 is a wasteful number, since it uses less digits than its factorization.

253403826 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 491.

The product of its (nonzero) digits is 34560, while the sum is 33.

The square root of 253403826 is about 15918.6628207271. The cubic root of 253403826 is about 632.8066813560.

The spelling of 253403826 in words is "two hundred fifty-three million, four hundred three thousand, eight hundred twenty-six".