1868640370 has 8 divisors (see below), whose sum is σ = 3363552684. Its totient is φ = 747456144.

The previous prime is 1868640353. The next prime is 1868640373. The reversal of 1868640370 is 730468681.

It can be written as a sum of positive squares in 2 ways, for example, as 1806845049 + 61795321 = 42507^2 + 7861^2 .

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

It is not an unprimeable number, because it can be changed into a prime (1868640373) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 93432009 + ... + 93432028.

Almost surely, 2^1868640370 is an apocalyptic number.

1868640370 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

1868640370 is a deficient number, since it is larger than the sum of its proper divisors (1494912314).

1868640370 is a wasteful number, since it uses less digits than its factorization.

1868640370 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 186864044.

The product of its (nonzero) digits is 193536, while the sum is 43.

The square root of 1868640370 is about 43227.7731325591. The cubic root of 1868640370 is about 1231.7103071785.

The spelling of 1868640370 in words is "one billion, eight hundred sixty-eight million, six hundred forty thousand, three hundred seventy".