843481840 has 20 divisors (see below), whose sum is σ = 1961095464. Its totient is φ = 337392704.

The previous prime is 843481819. The next prime is 843481853. The reversal of 843481840 is 48184348.

It is a tau number, because it is divible by the number of its divisors (20).

It is a super-2 number, since 2×843481840² = 1422923228819571200, which contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (40).

It is a junction number, because it is equal to n+sod(n) for n = 843481793 and 843481802.

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, 5271682 + ... + 5271841.

Almost surely, 2^843481840 is an apocalyptic number.

843481840 is a gapful number since it is divisible by the number (80) formed by its first and last digit.

It is an amenable number.

843481840 is an abundant number, since it is smaller than the sum of its proper divisors (1117613624).

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

843481840 is a wasteful number, since it uses less digits than its factorization.

843481840 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 10543536 (or 10543530 counting only the distinct ones).

The product of its (nonzero) digits is 98304, while the sum is 40.

The square root of 843481840 is about 29042.7588221229. The cubic root of 843481840 is about 944.8406700203.

The spelling of 843481840 in words is "eight hundred forty-three million, four hundred eighty-one thousand, eight hundred forty".