28974402672 has 80 divisors (see below), whose sum is σ = 75765998880. Its totient is φ = 9540550656.

The previous prime is 28974402649. The next prime is 28974402703. The reversal of 28974402672 is 27620447982.

It is a Smith number, since the sum of its digits (51) coincides with the sum of the digits of its prime factors.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 1754968 + ... + 1771400.

It is an arithmetic number, because the mean of its divisors is an integer number (947074986).

Almost surely, 2^28974402672 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 28974402672, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (37882999440).

28974402672 is an abundant number, since it is smaller than the sum of its proper divisors (46791596208).

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

28974402672 is a wasteful number, since it uses less digits than its factorization.

28974402672 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 16890 (or 16884 counting only the distinct ones).

The product of its (nonzero) digits is 2709504, while the sum is 51.

The spelling of 28974402672 in words is "twenty-eight billion, nine hundred seventy-four million, four hundred two thousand, six hundred seventy-two".