28093540140 has 72 divisors (see below), whose sum is σ = 85621059888. Its totient is φ = 7456095360.

The previous prime is 28093540133. The next prime is 28093540147. The reversal of 28093540140 is 4104539082.

28093540140 is a `hidden beast` number, since 28 + 0 + 93 + 540 + 1 + 4 + 0 = 666.

It is an interprime number because it is at equal distance from previous prime (28093540133) and next prime (28093540147).

It is a Harshad number since it is a multiple of its sum of digits (36).

It is a junction number, because it is equal to n+sod(n) for n = 28093540095 and 28093540104.

It is not an unprimeable number, because it can be changed into a prime (28093540147) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 331867 + ... + 407826.

Almost surely, 2^28093540140 is an apocalyptic number.

28093540140 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

28093540140 is an abundant number, since it is smaller than the sum of its proper divisors (57527519748).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

28093540140 is a wasteful number, since it uses less digits than its factorization.

28093540140 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 739919 (or 739914 counting only the distinct ones).

The product of its (nonzero) digits is 34560, while the sum is 36.

The spelling of 28093540140 in words is "twenty-eight billion, ninety-three million, five hundred forty thousand, one hundred forty".