28676913125 has 90 divisors (see below), whose sum is σ = 42561368190. Its totient is φ = 19259016000.

The previous prime is 28676913077. The next prime is 28676913127. The reversal of 28676913125 is 52131967682.

It is a happy number.

It can be written as a sum of positive squares in 5 ways, for example, as 18687710209 + 9989202916 = 136703^2 + 99946^2 .

It is not a de Polignac number, because 28676913125 - 2¹⁴ = 28676896741 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (28676913127) by changing a digit.

It is a polite number, since it can be written in 89 ways as a sum of consecutive naturals, for example, 106605491 + ... + 106605759.

It is an arithmetic number, because the mean of its divisors is an integer number (472904091).

Almost surely, 2^28676913125 is an apocalyptic number.

28676913125 is a gapful number since it is divisible by the number (25) formed by its first and last digit.

It is an amenable number.

28676913125 is a deficient number, since it is larger than the sum of its proper divisors (13884455065).

28676913125 is an frugal number, since it uses more digits than its factorization.

28676913125 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 421 (or 340 counting only the distinct ones).

The product of its digits is 1088640, while the sum is 50.

The spelling of 28676913125 in words is "twenty-eight billion, six hundred seventy-six million, nine hundred thirteen thousand, one hundred twenty-five".