28919746938 has 32 divisors (see below), whose sum is σ = 59410100736. Its totient is φ = 9381615408.

The previous prime is 28919746931. The next prime is 28919746949. The reversal of 28919746938 is 83964791982.

It is not an unprimeable number, because it can be changed into a prime (28919746931) 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, 400006 + ... + 466737.

It is an arithmetic number, because the mean of its divisors is an integer number (1856565648).

Almost surely, 2^28919746938 is an apocalyptic number.

28919746938 is an abundant number, since it is smaller than the sum of its proper divisors (30490353798).

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

28919746938 is a wasteful number, since it uses less digits than its factorization.

28919746938 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 866898.

The product of its digits is 47029248, while the sum is 66.

The spelling of 28919746938 in words is "twenty-eight billion, nine hundred nineteen million, seven hundred forty-six thousand, nine hundred thirty-eight".