28135451048 has 8 divisors (see below), whose sum is σ = 52753970730. Its totient is φ = 14067725520.

The previous prime is 28135451041. The next prime is 28135451059. The reversal of 28135451048 is 84015453182.

It can be written as a sum of positive squares in only one way, i.e., 27989959204 + 145491844 = 167302^2 + 12062^2 .

It is a tau number, because it is divible by the number of its divisors (8).

It is a junction number, because it is equal to n+sod(n) for n = 28135450996 and 28135451014.

It is not an unprimeable number, because it can be changed into a prime (28135451041) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1758465683 + ... + 1758465698.

Almost surely, 2^28135451048 is an apocalyptic number.

It is an amenable number.

28135451048 is a deficient number, since it is larger than the sum of its proper divisors (24618519682).

28135451048 is a wasteful number, since it uses less digits than its factorization.

28135451048 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3516931387 (or 3516931383 counting only the distinct ones).

The product of its (nonzero) digits is 153600, while the sum is 41.

The spelling of 28135451048 in words is "twenty-eight billion, one hundred thirty-five million, four hundred fifty-one thousand, forty-eight".