249928642 has 8 divisors (see below), whose sum is σ = 383611536. Its totient is φ = 122058132.

The previous prime is 249928633. The next prime is 249928663. The reversal of 249928642 is 246829942.

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

It is a junction number, because it is equal to n+sod(n) for n = 249928592 and 249928601.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1452988 + ... + 1453159.

It is an arithmetic number, because the mean of its divisors is an integer number (47951442).

Almost surely, 2^249928642 is an apocalyptic number.

249928642 is a deficient number, since it is larger than the sum of its proper divisors (133682894).

249928642 is a wasteful number, since it uses less digits than its factorization.

249928642 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2906192.

The product of its digits is 497664, while the sum is 46.

The square root of 249928642 is about 15809.1316017041. The cubic root of 249928642 is about 629.9005822797.

The spelling of 249928642 in words is "two hundred forty-nine million, nine hundred twenty-eight thousand, six hundred forty-two".