28134620646 has 24 divisors (see below), whose sum is σ = 61849663512. Its totient is φ = 8525642400.

The previous prime is 28134620561. The next prime is 28134620651. The reversal of 28134620646 is 64602643182.

It is a junction number, because it is equal to n+sod(n) for n = 28134620598 and 28134620607.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 19375735 + ... + 19377186.

It is an arithmetic number, because the mean of its divisors is an integer number (2577069313).

Almost surely, 2^28134620646 is an apocalyptic number.

28134620646 is an abundant number, since it is smaller than the sum of its proper divisors (33715042866).

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

28134620646 is a wasteful number, since it uses less digits than its factorization.

28134620646 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 38752948 (or 38752937 counting only the distinct ones).

The product of its (nonzero) digits is 331776, while the sum is 42.

The spelling of 28134620646 in words is "twenty-eight billion, one hundred thirty-four million, six hundred twenty thousand, six hundred forty-six".