28028149348 has 6 divisors (see below), whose sum is σ = 49049261366. Its totient is φ = 14014074672.

The previous prime is 28028149337. The next prime is 28028149363. The reversal of 28028149348 is 84394182082.

It can be written as a sum of positive squares in only one way, i.e., 16023002724 + 12005146624 = 126582^2 + 109568^2 .

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 3503518665 + ... + 3503518672.

Almost surely, 2^28028149348 is an apocalyptic number.

It is an amenable number.

28028149348 is a deficient number, since it is larger than the sum of its proper divisors (21021112018).

28028149348 is a wasteful number, since it uses less digits than its factorization.

28028149348 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7007037341 (or 7007037339 counting only the distinct ones).

The product of its (nonzero) digits is 884736, while the sum is 49.

The spelling of 28028149348 in words is "twenty-eight billion, twenty-eight million, one hundred forty-nine thousand, three hundred forty-eight".