249774980 has 48 divisors (see below), whose sum is σ = 645576960. Its totient is φ = 79049088.

The previous prime is 249774979. The next prime is 249774983. The reversal of 249774980 is 89477942.

It is not an unprimeable number, because it can be changed into a prime (249774983) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 66800 + ... + 70439.

It is an arithmetic number, because the mean of its divisors is an integer number (13449520).

Almost surely, 2^249774980 is an apocalyptic number.

249774980 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

249774980 is an abundant number, since it is smaller than the sum of its proper divisors (395801980).

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

249774980 is a wasteful number, since it uses less digits than its factorization.

249774980 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 137268 (or 137266 counting only the distinct ones).

The product of its (nonzero) digits is 1016064, while the sum is 50.

The square root of 249774980 is about 15804.2709417423. The cubic root of 249774980 is about 629.7714632561.

It can be divided in two parts, 2497 and 74980, that added together give a palindrome (77477).

The spelling of 249774980 in words is "two hundred forty-nine million, seven hundred seventy-four thousand, nine hundred eighty".