249344978 has 8 divisors (see below), whose sum is σ = 390279168. Its totient is φ = 119251924.

The previous prime is 249344969. The next prime is 249344983. The reversal of 249344978 is 879443942.

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

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 2710226 + ... + 2710317.

It is an arithmetic number, because the mean of its divisors is an integer number (48784896).

Almost surely, 2^249344978 is an apocalyptic number.

249344978 is a deficient number, since it is larger than the sum of its proper divisors (140934190).

249344978 is a wasteful number, since it uses less digits than its factorization.

249344978 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5420568.

The product of its digits is 1741824, while the sum is 50.

The square root of 249344978 is about 15790.6611007899. The cubic root of 249344978 is about 629.4098597326.

The spelling of 249344978 in words is "two hundred forty-nine million, three hundred forty-four thousand, nine hundred seventy-eight".