28788625031 has 2 divisors, whose sum is σ = 28788625032. Its totient is φ = 28788625030.

The previous prime is 28788624983. The next prime is 28788625043. The reversal of 28788625031 is 13052688782.

It is a happy number.

It is a strong prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-28788625031 is a prime.

It is a super-4 number, since 4×28788625031⁴ (a number of 43 digits) contains 4444 as substring. Note that it is a super-d number also for d = 2.

It is a Sophie Germain prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (28788625081) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 14394312515 + 14394312516.

It is an arithmetic number, because the mean of its divisors is an integer number (14394312516).

Almost surely, 2^28788625031 is an apocalyptic number.

28788625031 is a deficient number, since it is larger than the sum of its proper divisors (1).

28788625031 is an equidigital number, since it uses as much as digits as its factorization.

28788625031 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 1290240, while the sum is 50.

The spelling of 28788625031 in words is "twenty-eight billion, seven hundred eighty-eight million, six hundred twenty-five thousand, thirty-one".