28512633838 has 8 divisors (see below), whose sum is σ = 46058870088. Its totient is φ = 13159677144.

The previous prime is 28512633829. The next prime is 28512633839. The reversal of 28512633838 is 83833621582.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a super-2 number, since 2×28512633838² (a number of 22 digits) contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 28512633791 and 28512633800.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (28512633839) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 548319856 + ... + 548319907.

It is an arithmetic number, because the mean of its divisors is an integer number (5757358761).

Almost surely, 2^28512633838 is an apocalyptic number.

28512633838 is a deficient number, since it is larger than the sum of its proper divisors (17546236250).

28512633838 is a wasteful number, since it uses less digits than its factorization.

28512633838 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1096639778.

The product of its digits is 1658880, while the sum is 49.

The spelling of 28512633838 in words is "twenty-eight billion, five hundred twelve million, six hundred thirty-three thousand, eight hundred thirty-eight".