28361618947 has 8 divisors (see below), whose sum is σ = 28970343936. Its totient is φ = 27753114312.

The previous prime is 28361618939. The next prime is 28361618963. The reversal of 28361618947 is 74981616382.

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 28361618947 - 2³ = 28361618939 is a prime.

It is a super-3 number, since 3×28361618947³ (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 (28361612947) 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, 219628 + ... + 323974.

It is an arithmetic number, because the mean of its divisors is an integer number (3621292992).

Almost surely, 2^28361618947 is an apocalyptic number.

28361618947 is a deficient number, since it is larger than the sum of its proper divisors (608724989).

28361618947 is a wasteful number, since it uses less digits than its factorization.

28361618947 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 110177.

The product of its digits is 3483648, while the sum is 55.

The spelling of 28361618947 in words is "twenty-eight billion, three hundred sixty-one million, six hundred eighteen thousand, nine hundred forty-seven".