7880990887 has 32 divisors (see below), whose sum is σ = 9896832000. Its totient is φ = 6096729600.

The previous prime is 7880990869. The next prime is 7880990893.

7880990887 is nontrivially palindromic in base 10.

It is a cyclic number.

It is not a de Polignac number, because 7880990887 - 2¹⁹ = 7880466599 is a prime.

It is a super-2 number, since 2×7880990887² (a number of 21 digits) contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (7880990827) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 11115289 + ... + 11115997.

It is an arithmetic number, because the mean of its divisors is an integer number (309276000).

Almost surely, 2^7880990887 is an apocalyptic number.

7880990887 is a gapful number since it is divisible by the number (77) formed by its first and last digit.

7880990887 is a deficient number, since it is larger than the sum of its proper divisors (2015841113).

7880990887 is a wasteful number, since it uses less digits than its factorization.

7880990887 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1567.

The product of its (nonzero) digits is 16257024, while the sum is 64.

The square root of 7880990887 is about 88774.9451534610. The cubic root of 7880990887 is about 1990.0329857415.

The spelling of 7880990887 in words is "seven billion, eight hundred eighty million, nine hundred ninety thousand, eight hundred eighty-seven".