7820880287 has 16 divisors (see below), whose sum is σ = 8840223360. Its totient is φ = 6857479200.

The previous prime is 7820880281. The next prime is 7820880307.

It is a happy number.

7820880287 is nontrivially palindromic in base 10.

It is not a de Polignac number, because 7820880287 - 2⁴ = 7820880271 is a prime.

It is a super-2 number, since 2×7820880287² (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 (7820880281) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 79289 + ... + 148082.

It is an arithmetic number, because the mean of its divisors is an integer number (552513960).

Almost surely, 2^7820880287 is an apocalyptic number.

7820880287 is a deficient number, since it is larger than the sum of its proper divisors (1019343073).

7820880287 is a wasteful number, since it uses less digits than its factorization.

7820880287 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 227494.

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

The square root of 7820880287 is about 88435.7410044152. The cubic root of 7820880287 is about 1984.9605481693.

The spelling of 7820880287 in words is "seven billion, eight hundred twenty million, eight hundred eighty thousand, two hundred eighty-seven".