1878407642 has 8 divisors (see below), whose sum is σ = 2818474932. Its totient is φ = 938916000.

The previous prime is 1878407627. The next prime is 1878407653. The reversal of 1878407642 is 2467048781.

It can be written as a sum of positive squares in 2 ways, for example, as 1515467041 + 362940601 = 38929^2 + 19051^2 .

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

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, 135659 + ... + 148862.

Almost surely, 2^1878407642 is an apocalyptic number.

1878407642 is a deficient number, since it is larger than the sum of its proper divisors (940067290).

1878407642 is a wasteful number, since it uses less digits than its factorization.

1878407642 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 287824.

The product of its (nonzero) digits is 602112, while the sum is 47.

The square root of 1878407642 is about 43340.6003880888. The cubic root of 1878407642 is about 1233.8526044391.

The spelling of 1878407642 in words is "one billion, eight hundred seventy-eight million, four hundred seven thousand, six hundred forty-two".