7872309228 has 54 divisors (see below), whose sum is σ = 21373537836. Its totient is φ = 2248616496.

The previous prime is 7872309223. The next prime is 7872309233. The reversal of 7872309228 is 8229032787.

It is an interprime number because it is at equal distance from previous prime (7872309223) and next prime (7872309233).

It is not an unprimeable number, because it can be changed into a prime (7872309223) by changing a digit.

It is a polite number, since it can be written in 17 ways as a sum of consecutive naturals, for example, 2149663 + ... + 2153321.

Almost surely, 2^7872309228 is an apocalyptic number.

It is an amenable number.

7872309228 is an abundant number, since it is smaller than the sum of its proper divisors (13501228608).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

7872309228 is an equidigital number, since it uses as much as digits as its factorization.

7872309228 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7339 (or 3671 counting only the distinct ones).

The product of its (nonzero) digits is 677376, while the sum is 48.

The square root of 7872309228 is about 88726.0346685233. The cubic root of 7872309228 is about 1989.3019805535.

Multiplying 7872309228 by its sum of digits (48), we get a square (377870842944 = 614712²).

The spelling of 7872309228 in words is "seven billion, eight hundred seventy-two million, three hundred nine thousand, two hundred twenty-eight".