249768378 has 12 divisors (see below), whose sum is σ = 541164858. Its totient is φ = 83256120.

The previous prime is 249768361. The next prime is 249768391. The reversal of 249768378 is 873867942.

249768378 is a `hidden beast` number, since 2 + 497 + 6 + 83 + 78 = 666.

It can be written as a sum of positive squares in only one way, i.e., 150626529 + 99141849 = 12273^2 + 9957^2 .

It is a Curzon number.

It is an unprimeable number.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 6937993 + ... + 6938028.

Almost surely, 2^249768378 is an apocalyptic number.

249768378 is an abundant number, since it is smaller than the sum of its proper divisors (291396480).

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

249768378 is a wasteful number, since it uses less digits than its factorization.

249768378 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 13876029 (or 13876026 counting only the distinct ones).

The product of its digits is 4064256, while the sum is 54.

The square root of 249768378 is about 15804.0620727710. The cubic root of 249768378 is about 629.7659145447.

The spelling of 249768378 in words is "two hundred forty-nine million, seven hundred sixty-eight thousand, three hundred seventy-eight".