28661302219 has 8 divisors (see below), whose sum is σ = 31268339712. Its totient is φ = 26054508840.

The previous prime is 28661302213. The next prime is 28661302261. The reversal of 28661302219 is 91220316682.

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 28661302219 - 2⁷ = 28661302091 is a prime.

It is a super-2 number, since 2×28661302219² (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 (28661302213) 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, 256182 + ... + 350644.

It is an arithmetic number, because the mean of its divisors is an integer number (3908542464).

Almost surely, 2^28661302219 is an apocalyptic number.

28661302219 is a deficient number, since it is larger than the sum of its proper divisors (2607037493).

28661302219 is a wasteful number, since it uses less digits than its factorization.

28661302219 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 122057.

The product of its (nonzero) digits is 62208, while the sum is 40.

The spelling of 28661302219 in words is "twenty-eight billion, six hundred sixty-one million, three hundred two thousand, two hundred nineteen".