28203688890236 has 24 divisors (see below), whose sum is σ = 49447579923840. Its totient is φ = 14075809845552.

The previous prime is 28203688890233. The next prime is 28203688890239. The reversal of 28203688890236 is 63209888630282.

It is an interprime number because it is at equal distance from previous prime (28203688890233) and next prime (28203688890239).

It is a super-2 number, since 2×28203688890236² (a number of 28 digits) contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (28203688890233) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 198290801 + ... + 198432983.

It is an arithmetic number, because the mean of its divisors is an integer number (2060315830160).

Almost surely, 2^{28203688890236} is an apocalyptic number.

It is an amenable number.

28203688890236 is a deficient number, since it is larger than the sum of its proper divisors (21243891033604).

28203688890236 is a wasteful number, since it uses less digits than its factorization.

28203688890236 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 233393 (or 233391 counting only the distinct ones).

The product of its (nonzero) digits is 95551488, while the sum is 65.

The spelling of 28203688890236 in words is "twenty-eight trillion, two hundred three billion, six hundred eighty-eight million, eight hundred ninety thousand, two hundred thirty-six".