1868217340 has 24 divisors (see below), whose sum is σ = 4279916592. Its totient is φ = 679351680.

The previous prime is 1868217319. The next prime is 1868217349. The reversal of 1868217340 is 437128681.

It is a junction number, because it is equal to n+sod(n) for n = 1868217293 and 1868217302.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1868217349) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 4245729 + ... + 4246168.

It is an arithmetic number, because the mean of its divisors is an integer number (178329858).

Almost surely, 2^1868217340 is an apocalyptic number.

1868217340 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

1868217340 is an abundant number, since it is smaller than the sum of its proper divisors (2411699252).

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

1868217340 is a wasteful number, since it uses less digits than its factorization.

1868217340 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 8491917 (or 8491915 counting only the distinct ones).

The product of its (nonzero) digits is 64512, while the sum is 40.

The square root of 1868217340 is about 43222.8798207616. The cubic root of 1868217340 is about 1231.6173537236.

The spelling of 1868217340 in words is "one billion, eight hundred sixty-eight million, two hundred seventeen thousand, three hundred forty".