1868840340 has 48 divisors (see below), whose sum is σ = 5321453760. Its totient is φ = 489909760.

The previous prime is 1868840333. The next prime is 1868840341. The reversal of 1868840340 is 430488681.

It is a super-2 number, since 2×1868840340² = 6985128432822631200, which contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 1868840292 and 1868840301.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1868840341) 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, 260421 + ... + 267500.

It is an arithmetic number, because the mean of its divisors is an integer number (110863620).

Almost surely, 2^1868840340 is an apocalyptic number.

1868840340 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

1868840340 is an abundant number, since it is smaller than the sum of its proper divisors (3452613420).

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

1868840340 is a wasteful number, since it uses less digits than its factorization.

1868840340 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 527992 (or 527990 counting only the distinct ones).

The product of its (nonzero) digits is 147456, while the sum is 42.

The square root of 1868840340 is about 43230.0860512676. The cubic root of 1868840340 is about 1231.7542422108.

The spelling of 1868840340 in words is "one billion, eight hundred sixty-eight million, eight hundred forty thousand, three hundred forty".