28698142621 has 8 divisors (see below), whose sum is σ = 30439173600. Its totient is φ = 26980171920.

The previous prime is 28698142597. The next prime is 28698142633. The reversal of 28698142621 is 12624189682.

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

It is a cyclic number.

It is not a de Polignac number, because 28698142621 - 2²⁹ = 28161271709 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (28698142651) 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, 5762506 + ... + 5767483.

It is an arithmetic number, because the mean of its divisors is an integer number (3804896700).

Almost surely, 2^28698142621 is an apocalyptic number.

It is an amenable number.

28698142621 is a deficient number, since it is larger than the sum of its proper divisors (1741030979).

28698142621 is a wasteful number, since it uses less digits than its factorization.

28698142621 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 11530139.

The product of its digits is 663552, while the sum is 49.

The spelling of 28698142621 in words is "twenty-eight billion, six hundred ninety-eight million, one hundred forty-two thousand, six hundred twenty-one".