28490776915228 has 12 divisors (see below), whose sum is σ = 49858947516112. Its totient is φ = 14245363339200.

The previous prime is 28490776915213. The next prime is 28490776915243. The reversal of 28490776915228 is 82251967709482.

It is a happy number.

It is an interprime number because it is at equal distance from previous prime (28490776915213) and next prime (28490776915243).

It is a super-2 number, since 2×28490776915228² (a number of 28 digits) contains 22 as substring.

It is a hoax number, since the sum of its digits (70) coincides with the sum of the digits of its distinct prime factors.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 3600525 + ... + 8363332.

Almost surely, 2^{28490776915228} is an apocalyptic number.

It is an amenable number.

28490776915228 is a deficient number, since it is larger than the sum of its proper divisors (21368170600884).

28490776915228 is a wasteful number, since it uses less digits than its factorization.

28490776915228 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 12559212 (or 12559210 counting only the distinct ones).

The product of its (nonzero) digits is 243855360, while the sum is 70.

The spelling of 28490776915228 in words is "twenty-eight trillion, four hundred ninety billion, seven hundred seventy-six million, nine hundred fifteen thousand, two hundred twenty-eight".