28446040642 has 8 divisors (see below), whose sum is σ = 42738669756. Its totient is φ = 14199817392.

The previous prime is 28446040613. The next prime is 28446040643. The reversal of 28446040642 is 24604064482.

It is a happy number.

28446040642 is digitally balanced in base 5, because in such base it contains all the possibile digits an equal number of times.

It can be written as a sum of positive squares in 2 ways, for example, as 27317147841 + 1128892801 = 165279^2 + 33599^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is a junction number, because it is equal to n+sod(n) for n = 28446040595 and 28446040604.

It is not an unprimeable number, because it can be changed into a prime (28446040643) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 11599933 + ... + 11602384.

Almost surely, 2^28446040642 is an apocalyptic number.

28446040642 is a deficient number, since it is larger than the sum of its proper divisors (14292629114).

28446040642 is a wasteful number, since it uses less digits than its factorization.

28446040642 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 23202932.

The product of its (nonzero) digits is 294912, while the sum is 40.

The spelling of 28446040642 in words is "twenty-eight billion, four hundred forty-six million, forty thousand, six hundred forty-two".