7987690 has 16 divisors (see below), whose sum is σ = 14561280. Its totient is φ = 3154320.

The previous prime is 7987687. The next prime is 7987699. The reversal of 7987690 is 967897.

It is a super-2 number, since 2×7987690² = 127606383072200, which contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 7987690.

It is not an unprimeable number, because it can be changed into a prime (7987699) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 4266 + ... + 5845.

It is an arithmetic number, because the mean of its divisors is an integer number (910080).

Almost surely, 2^7987690 is an apocalyptic number.

7987690 is a deficient number, since it is larger than the sum of its proper divisors (6573590).

7987690 is a wasteful number, since it uses less digits than its factorization.

7987690 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 10197.

The product of its (nonzero) digits is 190512, while the sum is 46.

The square root of 7987690 is about 2826.2501658558. The cubic root of 7987690 is about 199.8973640049.

The spelling of 7987690 in words is "seven million, nine hundred eighty-seven thousand, six hundred ninety".