28945618971 has 16 divisors (see below), whose sum is σ = 39001202688. Its totient is φ = 19093651200.

The previous prime is 28945618969. The next prime is 28945618993. The reversal of 28945618971 is 17981654982.

It is not a de Polignac number, because 28945618971 - 2¹ = 28945618969 is a prime.

It is a super-2 number, since 2×28945618971² (a number of 22 digits) contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (28945618901) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 1618086 + ... + 1635876.

It is an arithmetic number, because the mean of its divisors is an integer number (2437575168).

Almost surely, 2^28945618971 is an apocalyptic number.

28945618971 is a deficient number, since it is larger than the sum of its proper divisors (10055583717).

28945618971 is a wasteful number, since it uses less digits than its factorization.

28945618971 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 23482.

The product of its digits is 8709120, while the sum is 60.

The spelling of 28945618971 in words is "twenty-eight billion, nine hundred forty-five million, six hundred eighteen thousand, nine hundred seventy-one".