28038820534 has 4 divisors (see below), whose sum is σ = 42058230804. Its totient is φ = 14019410266.

The previous prime is 28038820531. The next prime is 28038820547. The reversal of 28038820534 is 43502883082.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 43502883082 = 2 ⋅21751441541.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (28038820531) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 7009705132 + ... + 7009705135.

It is an arithmetic number, because the mean of its divisors is an integer number (10514557701).

Almost surely, 2^28038820534 is an apocalyptic number.

28038820534 is a deficient number, since it is larger than the sum of its proper divisors (14019410270).

28038820534 is a wasteful number, since it uses less digits than its factorization.

28038820534 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 14019410269.

The product of its (nonzero) digits is 368640, while the sum is 43.

The spelling of 28038820534 in words is "twenty-eight billion, thirty-eight million, eight hundred twenty thousand, five hundred thirty-four".