28134213940 has 48 divisors (see below), whose sum is σ = 69169008384. Its totient is φ = 9410745600.

The previous prime is 28134213923. The next prime is 28134213973. The reversal of 28134213940 is 4931243182.

It is a self number, because there is not a number n which added to its sum of digits gives 28134213940.

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, 2444976 + ... + 2456455.

It is an arithmetic number, because the mean of its divisors is an integer number (1441021008).

Almost surely, 2^28134213940 is an apocalyptic number.

28134213940 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

28134213940 is an abundant number, since it is smaller than the sum of its proper divisors (41034794444).

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

28134213940 is a wasteful number, since it uses less digits than its factorization.

28134213940 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4901488 (or 4901486 counting only the distinct ones).

The product of its (nonzero) digits is 41472, while the sum is 37.

The spelling of 28134213940 in words is "twenty-eight billion, one hundred thirty-four million, two hundred thirteen thousand, nine hundred forty".