28618293237 has 12 divisors (see below), whose sum is σ = 39888889824. Its totient is φ = 18249345400.

The previous prime is 28618293217. The next prime is 28618293239. The reversal of 28618293237 is 73239281682.

It is not a de Polignac number, because 28618293237 - 2⁶ = 28618293173 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 28618293237.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (28618293239) 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, 9014889 + ... + 9018062.

It is an arithmetic number, because the mean of its divisors is an integer number (3324074152).

Almost surely, 2^28618293237 is an apocalyptic number.

It is an amenable number.

28618293237 is a deficient number, since it is larger than the sum of its proper divisors (11270596587).

28618293237 is a wasteful number, since it uses less digits than its factorization.

28618293237 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 18033000 (or 18032977 counting only the distinct ones).

The product of its digits is 1741824, while the sum is 51.

The spelling of 28618293237 in words is "twenty-eight billion, six hundred eighteen million, two hundred ninety-three thousand, two hundred thirty-seven".