253405668 has 24 divisors (see below), whose sum is σ = 594911968. Its totient is φ = 83949696.

The previous prime is 253405661. The next prime is 253405681. The reversal of 253405668 is 866504352.

253405668 is digitally balanced in base 3, because in such base it contains all the possibile digits an equal number of times.

It is not an unprimeable number, because it can be changed into a prime (253405661) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 62821 + ... + 66732.

Almost surely, 2^253405668 is an apocalyptic number.

It is an amenable number.

253405668 is an abundant number, since it is smaller than the sum of its proper divisors (341506300).

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

253405668 is a wasteful number, since it uses less digits than its factorization.

253405668 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 129723 (or 129721 counting only the distinct ones).

The product of its (nonzero) digits is 172800, while the sum is 39.

The square root of 253405668 is about 15918.7206772404. The cubic root of 253405668 is about 632.8082146492.

The spelling of 253405668 in words is "two hundred fifty-three million, four hundred five thousand, six hundred sixty-eight".