7880220887 has 16 divisors (see below), whose sum is σ = 9846911232. Its totient is φ = 6126544320.

The previous prime is 7880220857. The next prime is 7880220899.

It is a happy number.

7880220887 is nontrivially palindromic in base 10.

It is a cyclic number.

It is not a de Polignac number, because 7880220887 - 2²² = 7876026583 is a prime.

It is a super-2 number, since 2×7880220887² (a number of 21 digits) contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (7880220847) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 81398 + ... + 149619.

It is an arithmetic number, because the mean of its divisors is an integer number (615431952).

Almost surely, 2^7880220887 is an apocalyptic number.

7880220887 is a gapful number since it is divisible by the number (77) formed by its first and last digit.

7880220887 is a deficient number, since it is larger than the sum of its proper divisors (1966690345).

7880220887 is a wasteful number, since it uses less digits than its factorization.

7880220887 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 231478.

The product of its (nonzero) digits is 802816, while the sum is 50.

The square root of 7880220887 is about 88770.6082383128. The cubic root of 7880220887 is about 1989.9681726011.

The spelling of 7880220887 in words is "seven billion, eight hundred eighty million, two hundred twenty thousand, eight hundred eighty-seven".