28743434238 has 32 divisors (see below), whose sum is σ = 59073785856. Its totient is φ = 9316950048.

The previous prime is 28743434207. The next prime is 28743434249. The reversal of 28743434238 is 83243434782.

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, 369195 + ... + 440217.

It is an arithmetic number, because the mean of its divisors is an integer number (1846055808).

Almost surely, 2^28743434238 is an apocalyptic number.

28743434238 is an abundant number, since it is smaller than the sum of its proper divisors (30330351618).

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

28743434238 is a wasteful number, since it uses less digits than its factorization.

28743434238 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 72888.

The product of its digits is 3096576, while the sum is 48.

The spelling of 28743434238 in words is "twenty-eight billion, seven hundred forty-three million, four hundred thirty-four thousand, two hundred thirty-eight".