28214793561 has 8 divisors (see below), whose sum is σ = 38833264384. Its totient is φ = 18203092560.

The previous prime is 28214793547. The next prime is 28214793601. The reversal of 28214793561 is 16539741282.

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

It is not a de Polignac number, because 28214793561 - 2⁷ = 28214793433 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 28214793561.

It is not an unprimeable number, because it can be changed into a prime (28214723561) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 151692346 + ... + 151692531.

It is an arithmetic number, because the mean of its divisors is an integer number (4854158048).

Almost surely, 2^28214793561 is an apocalyptic number.

It is an amenable number.

28214793561 is a deficient number, since it is larger than the sum of its proper divisors (10618470823).

28214793561 is a wasteful number, since it uses less digits than its factorization.

28214793561 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 303384911.

The product of its digits is 725760, while the sum is 48.

The spelling of 28214793561 in words is "twenty-eight billion, two hundred fourteen million, seven hundred ninety-three thousand, five hundred sixty-one".