1678361842 has 16 divisors (see below), whose sum is σ = 2627876160. Its totient is φ = 802427472.

The previous prime is 1678361813. The next prime is 1678361843. The reversal of 1678361842 is 2481638761.

It is a happy number.

It is a Harshad number since it is a multiple of its sum of digits (46).

It is a junction number, because it is equal to n+sod(n) for n = 1678361792 and 1678361801.

It is not an unprimeable number, because it can be changed into a prime (1678361843) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 245908 + ... + 252640.

It is an arithmetic number, because the mean of its divisors is an integer number (164242260).

Almost surely, 2^1678361842 is an apocalyptic number.

1678361842 is a deficient number, since it is larger than the sum of its proper divisors (949514318).

1678361842 is a wasteful number, since it uses less digits than its factorization.

1678361842 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 12177.

The product of its digits is 387072, while the sum is 46.

The square root of 1678361842 is about 40967.8147086222. The cubic root of 1678361842 is about 1188.3978727006.

The spelling of 1678361842 in words is "one billion, six hundred seventy-eight million, three hundred sixty-one thousand, eight hundred forty-two".