843867380 has 12 divisors (see below), whose sum is σ = 1772121540. Its totient is φ = 337546944.

The previous prime is 843867379. The next prime is 843867407. The reversal of 843867380 is 83768348.

It can be written as a sum of positive squares in 2 ways, for example, as 641203684 + 202663696 = 25322^2 + 14236^2 .

It is a super-2 number, since 2×843867380² = 1424224310056128800, which contains 22 as substring.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 21096665 + ... + 21096704.

It is an arithmetic number, because the mean of its divisors is an integer number (147676795).

Almost surely, 2^843867380 is an apocalyptic number.

It is an amenable number.

843867380 is an abundant number, since it is smaller than the sum of its proper divisors (928254160).

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

843867380 is a wasteful number, since it uses less digits than its factorization.

843867380 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 42193378 (or 42193376 counting only the distinct ones).

The product of its (nonzero) digits is 774144, while the sum is 47.

The square root of 843867380 is about 29049.3955186679. The cubic root of 843867380 is about 944.9846045102.

The spelling of 843867380 in words is "eight hundred forty-three million, eight hundred sixty-seven thousand, three hundred eighty".