253778 has 8 divisors (see below), whose sum is σ = 435072. Its totient is φ = 108756.

The previous prime is 253777. The next prime is 253787. The reversal of 253778 is 877352.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (253777) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 9050 + ... + 9077.

It is an arithmetic number, because the mean of its divisors is an integer number (54384).

2²⁵³⁷⁷⁸ is an apocalyptic number.

253778 is a deficient number, since it is larger than the sum of its proper divisors (181294).

253778 is a wasteful number, since it uses less digits than its factorization.

253778 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 18136.

The product of its digits is 11760, while the sum is 32.

The square root of 253778 is about 503.7638335570. The cubic root of 253778 is about 63.3117993888.

The spelling of 253778 in words is "two hundred fifty-three thousand, seven hundred seventy-eight".