7990887 has 8 divisors (see below), whose sum is σ = 11215360. Its totient is φ = 5046840.

The previous prime is 7990877. The next prime is 7990891. The reversal of 7990887 is 7880997.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 7990887 - 2⁶ = 7990823 is a prime.

It is a Duffinian number.

7990887 is a lucky number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (7990847) 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, 70039 + ... + 70152.

It is an arithmetic number, because the mean of its divisors is an integer number (1401920).

Almost surely, 2^7990887 is an apocalyptic number.

7990887 is a deficient number, since it is larger than the sum of its proper divisors (3224473).

7990887 is a wasteful number, since it uses less digits than its factorization.

7990887 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 140213.

The product of its (nonzero) digits is 254016, while the sum is 48.

The square root of 7990887 is about 2826.8156996875. The cubic root of 7990887 is about 199.9240294794.

The spelling of 7990887 in words is "seven million, nine hundred ninety thousand, eight hundred eighty-seven".