843425920 has 32 divisors (see below), whose sum is σ = 2016316620. Its totient is φ = 337370112.

The previous prime is 843425899. The next prime is 843425963. The reversal of 843425920 is 29524348.

It is a happy number.

It can be written as a sum of positive squares in 2 ways, for example, as 803382336 + 40043584 = 28344^2 + 6328^2 .

It is a tau number, because it is divible by the number of its divisors (32).

It is a super-2 number, since 2×843425920² = 1422734565055692800, which contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 843425920.

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, 658287 + ... + 659566.

Almost surely, 2^843425920 is an apocalyptic number.

843425920 is a gapful number since it is divisible by the number (80) formed by its first and last digit.

It is an amenable number.

843425920 is an abundant number, since it is smaller than the sum of its proper divisors (1172890700).

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

843425920 is a wasteful number, since it uses less digits than its factorization.

843425920 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1317872 (or 1317860 counting only the distinct ones).

The product of its (nonzero) digits is 69120, while the sum is 37.

The square root of 843425920 is about 29041.7960877078. The cubic root of 843425920 is about 944.8197896427.

The spelling of 843425920 in words is "eight hundred forty-three million, four hundred twenty-five thousand, nine hundred twenty".