28239716452392 has 24 divisors (see below), whose sum is σ = 76482565392090. Its totient is φ = 9413238817440.

The previous prime is 28239716452373. The next prime is 28239716452399. The reversal of 28239716452392 is 29325461793282.

28239716452392 is a `hidden beast` number, since 2 + 8 + 2 + 3 + 9 + 7 + 16 + 4 + 523 + 92 = 666.

It can be written as a sum of positive squares in only one way, i.e., 18459173259396 + 9780543192996 = 4296414^2 + 3127386^2 .

It is a tau number, because it is divible by the number of its divisors (24).

It is a super-2 number, since 2×28239716452392² (a number of 28 digits) contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (28239716452399) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 196109141959 + ... + 196109142102.

Almost surely, 2^{28239716452392} is an apocalyptic number.

It is an amenable number.

28239716452392 is an abundant number, since it is smaller than the sum of its proper divisors (48242848939698).

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

28239716452392 is a wasteful number, since it uses less digits than its factorization.

28239716452392 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 392218284073 (or 392218284066 counting only the distinct ones).

The product of its digits is 78382080, while the sum is 63.

The spelling of 28239716452392 in words is "twenty-eight trillion, two hundred thirty-nine billion, seven hundred sixteen million, four hundred fifty-two thousand, three hundred ninety-two".