8087388021 has 12 divisors (see below), whose sum is σ = 12084603180. Its totient is φ = 5205674880.

The previous prime is 8087388017. The next prime is 8087388103. The reversal of 8087388021 is 1208837808.

It is a happy number.

It can be written as a sum of positive squares in 2 ways, for example, as 3462027921 + 4625360100 = 58839^2 + 68010^2 .

It is not a de Polignac number, because 8087388021 - 2² = 8087388017 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (8087318021) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 15492820 + ... + 15493341.

It is an arithmetic number, because the mean of its divisors is an integer number (1007050265).

Almost surely, 2^8087388021 is an apocalyptic number.

It is an amenable number.

8087388021 is a deficient number, since it is larger than the sum of its proper divisors (3997215159).

8087388021 is a wasteful number, since it uses less digits than its factorization.

8087388021 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 30986196 (or 30986193 counting only the distinct ones).

The product of its (nonzero) digits is 172032, while the sum is 45.

The square root of 8087388021 is about 89929.9061547381. The cubic root of 8087388021 is about 2007.2559786352.

The spelling of 8087388021 in words is "eight billion, eighty-seven million, three hundred eighty-eight thousand, twenty-one".