28231552144 has 20 divisors (see below), whose sum is σ = 54703158124. Its totient is φ = 14114608128.

The previous prime is 28231552121. The next prime is 28231552157. The reversal of 28231552144 is 44125513282.

It can be written as a sum of positive squares in 2 ways, for example, as 88134544 + 28143417600 = 9388^2 + 167760^2 .

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 146404 + ... + 279100.

Almost surely, 2^28231552144 is an apocalyptic number.

It is an amenable number.

28231552144 is a deficient number, since it is larger than the sum of its proper divisors (26471605980).

28231552144 is a wasteful number, since it uses less digits than its factorization.

28231552144 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 146002 (or 145996 counting only the distinct ones).

The product of its digits is 76800, while the sum is 37.

The spelling of 28231552144 in words is "twenty-eight billion, two hundred thirty-one million, five hundred fifty-two thousand, one hundred forty-four".