7820008 has 24 divisors (see below), whose sum is σ = 17057250. Its totient is φ = 3351264.

The previous prime is 7820003. The next prime is 7820063. The reversal of 7820008 is 8000287.

It can be written as a sum of positive squares in only one way, i.e., 7606564 + 213444 = 2758^2 + 462^2 .

It is a super-2 number, since 2×7820008² = 122305050240128, which contains 22 as substring.

It is an Ulam number.

It is not an unprimeable number, because it can be changed into a prime (7820003) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 9583 + ... + 10366.

Almost surely, 2^7820008 is an apocalyptic number.

It is an amenable number.

7820008 is an abundant number, since it is smaller than the sum of its proper divisors (9237242).

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

7820008 is a wasteful number, since it uses less digits than its factorization.

7820008 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 19969 (or 19958 counting only the distinct ones).

The product of its (nonzero) digits is 896, while the sum is 25.

The square root of 7820008 is about 2796.4277212186. The cubic root of 7820008 is about 198.4886749160.

The spelling of 7820008 in words is "seven million, eight hundred twenty thousand, eight".