249998806 has 8 divisors (see below), whose sum is σ = 376458120. Its totient is φ = 124512768.

The previous prime is 249998797. The next prime is 249998809. The reversal of 249998806 is 608899942.

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

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (249998809) 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, 242676 + ... + 243703.

It is an arithmetic number, because the mean of its divisors is an integer number (47057265).

Almost surely, 2^249998806 is an apocalyptic number.

249998806 is a deficient number, since it is larger than the sum of its proper divisors (126459314).

249998806 is a wasteful number, since it uses less digits than its factorization.

249998806 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 486638.

The product of its (nonzero) digits is 2239488, while the sum is 55.

The square root of 249998806 is about 15811.3505432016. The cubic root of 249998806 is about 629.9595220487.

The spelling of 249998806 in words is "two hundred forty-nine million, nine hundred ninety-eight thousand, eight hundred six".