28552350638 has 16 divisors (see below), whose sum is σ = 49085555040. Its totient is φ = 12202054656.

The previous prime is 28552350637. The next prime is 28552350647. The reversal of 28552350638 is 83605325582.

It is a junction number, because it is equal to n+sod(n) for n = 28552350592 and 28552350601.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (28552350637) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 2883803 + ... + 2893686.

It is an arithmetic number, because the mean of its divisors is an integer number (3067847190).

Almost surely, 2^28552350638 is an apocalyptic number.

28552350638 is a deficient number, since it is larger than the sum of its proper divisors (20533204402).

28552350638 is a wasteful number, since it uses less digits than its factorization.

28552350638 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5777851.

The product of its (nonzero) digits is 1728000, while the sum is 47.

The spelling of 28552350638 in words is "twenty-eight billion, five hundred fifty-two million, three hundred fifty thousand, six hundred thirty-eight".