7820987284 has 12 divisors (see below), whose sum is σ = 14930975808. Its totient is φ = 3554994200.

The previous prime is 7820987261. The next prime is 7820987299. The reversal of 7820987284 is 4827890287.

It is a super-2 number, since 2×7820987284² (a number of 21 digits) contains 22 as substring.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 88874812 + ... + 88874899.

It is an arithmetic number, because the mean of its divisors is an integer number (1244247984).

Almost surely, 2^7820987284 is an apocalyptic number.

It is an amenable number.

7820987284 is a deficient number, since it is larger than the sum of its proper divisors (7109988524).

7820987284 is a wasteful number, since it uses less digits than its factorization.

7820987284 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 177749726 (or 177749724 counting only the distinct ones).

The product of its (nonzero) digits is 3612672, while the sum is 55.

The square root of 7820987284 is about 88436.3459444136. The cubic root of 7820987284 is about 1984.9696001706.

The spelling of 7820987284 in words is "seven billion, eight hundred twenty million, nine hundred eighty-seven thousand, two hundred eighty-four".