245988 has 18 divisors (see below), whose sum is σ = 621894. Its totient is φ = 81984.

The previous prime is 245983. The next prime is 245989. The reversal of 245988 is 889542.

It can be written as a sum of positive squares in only one way, i.e., 166464 + 79524 = 408^2 + 282^2 .

It is a tau number, because it is divible by the number of its divisors (18).

It is a super-2 number, since 2×245988² = 121020192288, which contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (36), and also a Moran number because the ratio is a prime number: 6833 = 245988 / (2 + 4 + 5 + 9 + 8 + 8).

It is a nialpdrome in base 12.

It is an inconsummate number, since it does not exist a number n which divided by its sum of digits gives 245988.

It is not an unprimeable number, because it can be changed into a prime (245981) by changing a digit.

245988 is an untouchable number, because it is not equal to the sum of proper divisors of any number.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 3381 + ... + 3452.

2²⁴⁵⁹⁸⁸ is an apocalyptic number.

It is an amenable number.

245988 is an abundant number, since it is smaller than the sum of its proper divisors (375906).

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

245988 is a wasteful number, since it uses less digits than its factorization.

245988 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6843 (or 6838 counting only the distinct ones).

The product of its digits is 23040, while the sum is 36.

The square root of 245988 is about 495.9717733904. The cubic root of 245988 is about 62.6572467104.

The spelling of 245988 in words is "two hundred forty-five thousand, nine hundred eighty-eight".