6987880 has 32 divisors (see below), whose sum is σ = 15893640. Its totient is φ = 2764800.

The previous prime is 6987863. The next prime is 6987907. The reversal of 6987880 is 887896.

It can be written as a sum of positive squares in 4 ways, for example, as 4104676 + 2883204 = 2026^2 + 1698^2 .

It is a self number, because there is not a number n which added to its sum of digits gives 6987880.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 2980 + ... + 4780.

Almost surely, 2^6987880 is an apocalyptic number.

It is an amenable number.

6987880 is an abundant number, since it is smaller than the sum of its proper divisors (8905760).

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

6987880 is a wasteful number, since it uses less digits than its factorization.

6987880 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1909 (or 1905 counting only the distinct ones).

The product of its (nonzero) digits is 193536, while the sum is 46.

The square root of 6987880 is about 2643.4598540549. The cubic root of 6987880 is about 191.1826510405.

The spelling of 6987880 in words is "six million, nine hundred eighty-seven thousand, eight hundred eighty".