7988140 has 24 divisors (see below), whose sum is σ = 16842672. Its totient is φ = 3182400.

The previous prime is 7988131. The next prime is 7988177. The reversal of 7988140 is 418897.

It is a self number, because there is not a number n which added to its sum of digits gives 7988140.

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, 5490 + ... + 6790.

It is an arithmetic number, because the mean of its divisors is an integer number (701778).

Almost surely, 2^7988140 is an apocalyptic number.

It is an amenable number.

7988140 is an abundant number, since it is smaller than the sum of its proper divisors (8854532).

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

7988140 is a wasteful number, since it uses less digits than its factorization.

7988140 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1617 (or 1615 counting only the distinct ones).

The product of its (nonzero) digits is 16128, while the sum is 37.

The square root of 7988140 is about 2826.3297755216. The cubic root of 7988140 is about 199.9011177863.

It can be divided in two parts, 7988 and 140, that added together give a triangular number (8128 = T₁₂₇).

The spelling of 7988140 in words is "seven million, nine hundred eighty-eight thousand, one hundred forty".