28232904437 has 2 divisors, whose sum is σ = 28232904438. Its totient is φ = 28232904436.

The previous prime is 28232904433. The next prime is 28232904449. The reversal of 28232904437 is 73440923282.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 23917859716 + 4315044721 = 154654^2 + 65689^2 .

It is a cyclic number.

It is not a de Polignac number, because 28232904437 - 2² = 28232904433 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (28232904431) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 14116452218 + 14116452219.

It is an arithmetic number, because the mean of its divisors is an integer number (14116452219).

Almost surely, 2^28232904437 is an apocalyptic number.

It is an amenable number.

28232904437 is a deficient number, since it is larger than the sum of its proper divisors (1).

28232904437 is an equidigital number, since it uses as much as digits as its factorization.

28232904437 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 580608, while the sum is 44.

The spelling of 28232904437 in words is "twenty-eight billion, two hundred thirty-two million, nine hundred four thousand, four hundred thirty-seven".