28137948658 has 4 divisors (see below), whose sum is σ = 42206922990. Its totient is φ = 14068974328.

The previous prime is 28137948649. The next prime is 28137948689. The reversal of 28137948658 is 85684973182.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in only one way, i.e., 23843374569 + 4294574089 = 154413^2 + 65533^2 .

It is a junction number, because it is equal to n+sod(n) for n = 28137948596 and 28137948605.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 7034487163 + ... + 7034487166.

Almost surely, 2^28137948658 is an apocalyptic number.

28137948658 is a deficient number, since it is larger than the sum of its proper divisors (14068974332).

28137948658 is a wasteful number, since it uses less digits than its factorization.

28137948658 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 14068974331.

The product of its digits is 23224320, while the sum is 61.

The spelling of 28137948658 in words is "twenty-eight billion, one hundred thirty-seven million, nine hundred forty-eight thousand, six hundred fifty-eight".