7879820 has 24 divisors (see below), whose sum is σ = 17821104. Its totient is φ = 2909376.

The previous prime is 7879799. The next prime is 7879841. The reversal of 7879820 is 289787.

It is an interprime number because it is at equal distance from previous prime (7879799) and next prime (7879841).

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, 14894 + ... + 15413.

It is an arithmetic number, because the mean of its divisors is an integer number (742546).

Almost surely, 2^7879820 is an apocalyptic number.

It is an amenable number.

7879820 is an abundant number, since it is smaller than the sum of its proper divisors (9941284).

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

7879820 is a wasteful number, since it uses less digits than its factorization.

7879820 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 30329 (or 30327 counting only the distinct ones).

The product of its (nonzero) digits is 56448, while the sum is 41.

The square root of 7879820 is about 2807.1017081681. The cubic root of 7879820 is about 198.9934427105.

The spelling of 7879820 in words is "seven million, eight hundred seventy-nine thousand, eight hundred twenty".