28280677956 has 24 divisors (see below), whose sum is σ = 66168063360. Its totient is φ = 9401204832.

The previous prime is 28280677951. The next prime is 28280677969. The reversal of 28280677956 is 65977608282.

It is a self number, because there is not a number n which added to its sum of digits gives 28280677956.

It is not an unprimeable number, because it can be changed into a prime (28280677951) 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, 3206391 + ... + 3215198.

It is an arithmetic number, because the mean of its divisors is an integer number (2757002640).

Almost surely, 2^28280677956 is an apocalyptic number.

It is an amenable number.

28280677956 is an abundant number, since it is smaller than the sum of its proper divisors (37887385404).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

28280677956 is a wasteful number, since it uses less digits than its factorization.

28280677956 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6421963 (or 6421961 counting only the distinct ones).

The product of its (nonzero) digits is 20321280, while the sum is 60.

The spelling of 28280677956 in words is "twenty-eight billion, two hundred eighty million, six hundred seventy-seven thousand, nine hundred fifty-six".