1238695642 has 8 divisors (see below), whose sum is σ = 1858197600. Its totient is φ = 619296444.

The previous prime is 1238695621. The next prime is 1238695651. The reversal of 1238695642 is 2465968321.

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 = 1238695592 and 1238695601.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 22609 + ... + 54667.

It is an arithmetic number, because the mean of its divisors is an integer number (232274700).

Almost surely, 2^1238695642 is an apocalyptic number.

1238695642 is a deficient number, since it is larger than the sum of its proper divisors (619501958).

1238695642 is a wasteful number, since it uses less digits than its factorization.

1238695642 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 51380.

The product of its digits is 622080, while the sum is 46.

The square root of 1238695642 is about 35195.1082112273. The cubic root of 1238695642 is about 1073.9602398624.

The spelling of 1238695642 in words is "one billion, two hundred thirty-eight million, six hundred ninety-five thousand, six hundred forty-two".