28872469947 has 8 divisors (see below), whose sum is σ = 38519698960. Its totient is φ = 19236777120.

The previous prime is 28872469943. The next prime is 28872469949. The reversal of 28872469947 is 74996427882.

It is a happy number.

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

It is not a de Polignac number, because 28872469947 - 2² = 28872469943 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (28872469943) 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, 2878204 + ... + 2888217.

It is an arithmetic number, because the mean of its divisors is an integer number (4814962370).

Almost surely, 2^28872469947 is an apocalyptic number.

28872469947 is a deficient number, since it is larger than the sum of its proper divisors (9647229013).

28872469947 is a wasteful number, since it uses less digits than its factorization.

28872469947 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5768093.

The product of its digits is 97542144, while the sum is 66.

The spelling of 28872469947 in words is "twenty-eight billion, eight hundred seventy-two million, four hundred sixty-nine thousand, nine hundred forty-seven".