840347928 has 48 divisors (see below), whose sum is σ = 2601078480. Its totient is φ = 240099264.

The previous prime is 840347923. The next prime is 840347929. The reversal of 840347928 is 829743048.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (840347923) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 833175 + ... + 834182.

It is an arithmetic number, because the mean of its divisors is an integer number (54189135).

Almost surely, 2^840347928 is an apocalyptic number.

It is an amenable number.

840347928 is an abundant number, since it is smaller than the sum of its proper divisors (1760730552).

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

840347928 is a wasteful number, since it uses less digits than its factorization.

840347928 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1667376 (or 1667369 counting only the distinct ones).

The product of its (nonzero) digits is 387072, while the sum is 45.

The square root of 840347928 is about 28988.7551992147. The cubic root of 840347928 is about 943.6690493378.

The spelling of 840347928 in words is "eight hundred forty million, three hundred forty-seven thousand, nine hundred twenty-eight".