28502612121 has 8 divisors (see below), whose sum is σ = 38004845824. Its totient is φ = 19001059920.

The previous prime is 28502612087. The next prime is 28502612167. The reversal of 28502612121 is 12121620582.

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

It is not a de Polignac number, because 28502612121 - 2¹⁵ = 28502579353 is a prime.

It is a super-2 number, since 2×28502612121² (a number of 22 digits) contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (28502612191) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 63145 + ... + 246966.

It is an arithmetic number, because the mean of its divisors is an integer number (4750605728).

Almost surely, 2^28502612121 is an apocalyptic number.

It is an amenable number.

28502612121 is a deficient number, since it is larger than the sum of its proper divisors (9502233703).

28502612121 is a wasteful number, since it uses less digits than its factorization.

28502612121 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 340751.

The product of its (nonzero) digits is 3840, while the sum is 30.

The spelling of 28502612121 in words is "twenty-eight billion, five hundred two million, six hundred twelve thousand, one hundred twenty-one".