253750644 has 120 divisors (see below), whose sum is σ = 772789248. Its totient is φ = 71098560.

The previous prime is 253750639. The next prime is 253750657. The reversal of 253750644 is 446057352.

253750644 is a `hidden beast` number, since 2 + 5 + 3 + 7 + 5 + 0 + 644 = 666.

It is a Smith number, since the sum of its digits (36) coincides with the sum of the digits of its prime factors.

It is a Harshad number since it is a multiple of its sum of digits (36).

It is a junction number, because it is equal to n+sod(n) for n = 253750599 and 253750608.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 39 ways as a sum of consecutive naturals, for example, 119149 + ... + 121259.

Almost surely, 2^253750644 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 253750644, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (386394624).

253750644 is an abundant number, since it is smaller than the sum of its proper divisors (519038604).

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

253750644 is a wasteful number, since it uses less digits than its factorization.

253750644 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2187 (or 2176 counting only the distinct ones).

The product of its (nonzero) digits is 100800, while the sum is 36.

The square root of 253750644 is about 15929.5525360884. The cubic root of 253750644 is about 633.0952440858.

The spelling of 253750644 in words is "two hundred fifty-three million, seven hundred fifty thousand, six hundred forty-four".