1868665120 has 192 divisors, whose sum is σ = 5267275776. Its totient is φ = 613002240.

The previous prime is 1868665111. The next prime is 1868665129. The reversal of 1868665120 is 215668681.

It is an interprime number because it is at equal distance from previous prime (1868665111) and next prime (1868665129).

It is a super-2 number, since 2×1868665120² = 6983818661409228800, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (1868665129) 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 31 ways as a sum of consecutive naturals, for example, 3714789 + ... + 3715291.

It is an arithmetic number, because the mean of its divisors is an integer number (27433728).

Almost surely, 2^1868665120 is an apocalyptic number.

1868665120 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 1868665120, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (2633637888).

1868665120 is an abundant number, since it is smaller than the sum of its proper divisors (3398610656).

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

1868665120 is a wasteful number, since it uses less digits than its factorization.

1868665120 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 663 (or 655 counting only the distinct ones).

The product of its (nonzero) digits is 138240, while the sum is 43.

The square root of 1868665120 is about 43228.0594058998. The cubic root of 1868665120 is about 1231.7157451244.

The spelling of 1868665120 in words is "one billion, eight hundred sixty-eight million, six hundred sixty-five thousand, one hundred twenty".