249978774 has 8 divisors (see below), whose sum is σ = 499957560. Its totient is φ = 83326256.

The previous prime is 249978749. The next prime is 249978779. The reversal of 249978774 is 477879942.

It is a happy number.

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

249978774 is an admirable number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (249978779) 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, 20831559 + ... + 20831570.

It is an arithmetic number, because the mean of its divisors is an integer number (62494695).

Almost surely, 2^249978774 is an apocalyptic number.

249978774 is a primitive abundant number, since it is smaller than the sum of its proper divisors, none of which is abundant.

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

249978774 is a wasteful number, since it uses less digits than its factorization.

249978774 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 41663134.

The product of its digits is 7112448, while the sum is 57.

The square root of 249978774 is about 15810.7170615377. The cubic root of 249978774 is about 629.9426957200.

The spelling of 249978774 in words is "two hundred forty-nine million, nine hundred seventy-eight thousand, seven hundred seventy-four".