28215274148 has 6 divisors (see below), whose sum is σ = 49376729766. Its totient is φ = 14107637072.

The previous prime is 28215274141. The next prime is 28215274159. The reversal of 28215274148 is 84147251282.

It can be written as a sum of positive squares in only one way, i.e., 28156168804 + 59105344 = 167798^2 + 7688^2 .

It is a super-2 number, since 2×28215274148² (a number of 22 digits) contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 28215274099 and 28215274108.

It is not an unprimeable number, because it can be changed into a prime (28215274141) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 3526909265 + ... + 3526909272.

It is an arithmetic number, because the mean of its divisors is an integer number (8229454961).

Almost surely, 2^28215274148 is an apocalyptic number.

It is an amenable number.

28215274148 is a deficient number, since it is larger than the sum of its proper divisors (21161455618).

28215274148 is a wasteful number, since it uses less digits than its factorization.

28215274148 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7053818541 (or 7053818539 counting only the distinct ones).

The product of its digits is 286720, while the sum is 44.

The spelling of 28215274148 in words is "twenty-eight billion, two hundred fifteen million, two hundred seventy-four thousand, one hundred forty-eight".