1868688378 has 24 divisors (see below), whose sum is σ = 4051332948. Its totient is φ = 622510272.

The previous prime is 1868688301. The next prime is 1868688379. The reversal of 1868688378 is 8738868681.

1868688378 is a `hidden beast` number, since 186 + 8 + 6 + 88 + 378 = 666.

It can be written as a sum of positive squares in 2 ways, for example, as 1784471049 + 84217329 = 42243^2 + 9177^2 .

It is not an unprimeable number, because it can be changed into a prime (1868688379) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 1501 + ... + 61152.

Almost surely, 2^1868688378 is an apocalyptic number.

1868688378 is a gapful number since it is divisible by the number (18) formed by its first and last digit.

1868688378 is an abundant number, since it is smaller than the sum of its proper divisors (2182644570).

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

1868688378 is a wasteful number, since it uses less digits than its factorization.

1868688378 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 64318 (or 64315 counting only the distinct ones).

The product of its digits is 24772608, while the sum is 63.

The square root of 1868688378 is about 43228.3284201460. The cubic root of 1868688378 is about 1231.7208552117.

The spelling of 1868688378 in words is "one billion, eight hundred sixty-eight million, six hundred eighty-eight thousand, three hundred seventy-eight".