1380668642 has 8 divisors (see below), whose sum is σ = 2075328000. Its totient is φ = 688892644.

The previous prime is 1380668623. The next prime is 1380668683. The reversal of 1380668642 is 2468660831.

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 = 1380668593 and 1380668602.

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, 719642 + ... + 721557.

It is an arithmetic number, because the mean of its divisors is an integer number (259416000).

Almost surely, 2^1380668642 is an apocalyptic number.

1380668642 is a deficient number, since it is larger than the sum of its proper divisors (694659358).

1380668642 is a wasteful number, since it uses less digits than its factorization.

1380668642 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1441680.

The product of its (nonzero) digits is 331776, while the sum is 44.

The square root of 1380668642 is about 37157.3497709403. The cubic root of 1380668642 is about 1113.5160649026.

The spelling of 1380668642 in words is "one billion, three hundred eighty million, six hundred sixty-eight thousand, six hundred forty-two".