28312121363 has 8 divisors (see below), whose sum is σ = 29331940800. Its totient is φ = 27295204608.

The previous prime is 28312121359. The next prime is 28312121381. The reversal of 28312121363 is 36312121382.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 28312121363 - 2² = 28312121359 is a prime.

It is a super-3 number, since 3×28312121363³ (a number of 32 digits) contains 333 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (28312021363) 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, 705803 + ... + 744836.

It is an arithmetic number, because the mean of its divisors is an integer number (3666492600).

Almost surely, 2^28312121363 is an apocalyptic number.

28312121363 is a deficient number, since it is larger than the sum of its proper divisors (1019819437).

28312121363 is a wasteful number, since it uses less digits than its factorization.

28312121363 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1451341.

The product of its digits is 10368, while the sum is 32.

The spelling of 28312121363 in words is "twenty-eight billion, three hundred twelve million, one hundred twenty-one thousand, three hundred sixty-three".