1868352290 has 32 divisors (see below), whose sum is σ = 3915993600. Its totient is φ = 628490304.

The previous prime is 1868352253. The next prime is 1868352293. The reversal of 1868352290 is 922538681.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (1868352293) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 248090 + ... + 255509.

It is an arithmetic number, because the mean of its divisors is an integer number (122374800).

Almost surely, 2^1868352290 is an apocalyptic number.

1868352290 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

1868352290 is an abundant number, since it is smaller than the sum of its proper divisors (2047641310).

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

1868352290 is a wasteful number, since it uses less digits than its factorization.

1868352290 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 503666.

The product of its (nonzero) digits is 207360, while the sum is 44.

The square root of 1868352290 is about 43224.4408870722. The cubic root of 1868352290 is about 1231.6470081534.

The spelling of 1868352290 in words is "one billion, eight hundred sixty-eight million, three hundred fifty-two thousand, two hundred ninety".