1908042678 has 24 divisors (see below), whose sum is σ = 4183904088. Its totient is φ = 628350912.

The previous prime is 1908042667. The next prime is 1908042709. The reversal of 1908042678 is 8762408091.

It is a super-2 number, since 2×1908042678² = 7281253722138823368, which contains 22 as substring.

It is a congruent number.

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 11 ways as a sum of consecutive naturals, for example, 637075 + ... + 640062.

It is an arithmetic number, because the mean of its divisors is an integer number (174329337).

Almost surely, 2^1908042678 is an apocalyptic number.

1908042678 is a gapful number since it is divisible by the number (18) formed by its first and last digit.

1908042678 is an abundant number, since it is smaller than the sum of its proper divisors (2275861410).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

1908042678 is a wasteful number, since it uses less digits than its factorization.

1908042678 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1277228 (or 1277225 counting only the distinct ones).

The product of its (nonzero) digits is 193536, while the sum is 45.

The square root of 1908042678 is about 43681.1478557970. The cubic root of 1908042678 is about 1240.3074762132.

The spelling of 1908042678 in words is "one billion, nine hundred eight million, forty-two thousand, six hundred seventy-eight".