28247949242865 has 48 divisors (see below), whose sum is σ = 54857933896896. Its totient is φ = 13325813884800.

The previous prime is 28247949242809. The next prime is 28247949242867. The reversal of 28247949242865 is 56824294974282.

It is a happy number.

28247949242865 is a `hidden beast` number, since 2 + 8 + 2 + 4 + 79 + 492 + 4 + 2 + 8 + 65 = 666.

It is not a de Polignac number, because 28247949242865 - 2¹⁴ = 28247949226481 is a prime.

It is a Curzon number.

It is a junction number, because it is equal to n+sod(n) for n = 28247949242793 and 28247949242802.

It is not an unprimeable number, because it can be changed into a prime (28247949242867) by changing a digit.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 771151471 + ... + 771188100.

It is an arithmetic number, because the mean of its divisors is an integer number (1142873622852).

Almost surely, 2^{28247949242865} is an apocalyptic number.

It is an amenable number.

28247949242865 is a deficient number, since it is larger than the sum of its proper divisors (26609984654031).

28247949242865 is a wasteful number, since it uses less digits than its factorization.

28247949242865 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1542339630 (or 1542339627 counting only the distinct ones).

The product of its digits is 1114767360, while the sum is 72.

The spelling of 28247949242865 in words is "twenty-eight trillion, two hundred forty-seven billion, nine hundred forty-nine million, two hundred forty-two thousand, eight hundred sixty-five".