7981828 has 24 divisors (see below), whose sum is σ = 14736960. Its totient is φ = 3775200.

The previous prime is 7981819. The next prime is 7981837. The reversal of 7981828 is 8281897.

It is an interprime number because it is at equal distance from previous prime (7981819) and next prime (7981837).

It is an Ulam number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 8863 + ... + 9721.

It is an arithmetic number, because the mean of its divisors is an integer number (614040).

Almost surely, 2^7981828 is an apocalyptic number.

It is an amenable number.

7981828 is a deficient number, since it is larger than the sum of its proper divisors (6755132).

7981828 is a wasteful number, since it uses less digits than its factorization.

7981828 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 987 (or 985 counting only the distinct ones).

The product of its digits is 64512, while the sum is 43.

The square root of 7981828 is about 2825.2129123307. The cubic root of 7981828 is about 199.8484518615.

The spelling of 7981828 in words is "seven million, nine hundred eighty-one thousand, eight hundred twenty-eight".