28290298642 has 8 divisors (see below), whose sum is σ = 43582352076. Its totient is φ = 13762847952.

The previous prime is 28290298637. The next prime is 28290298643. The reversal of 28290298642 is 24689209282.

It can be written as a sum of positive squares in 2 ways, for example, as 28287539721 + 2758921 = 168189^2 + 1661^2 .

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

It is a self number, because there is not a number n which added to its sum of digits gives 28290298642.

It is not an unprimeable number, because it can be changed into a prime (28290298643) 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, 191150593 + ... + 191150740.

Almost surely, 2^28290298642 is an apocalyptic number.

28290298642 is a deficient number, since it is larger than the sum of its proper divisors (15292053434).

28290298642 is a wasteful number, since it uses less digits than its factorization.

28290298642 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 382301372.

The product of its (nonzero) digits is 1990656, while the sum is 52.

The spelling of 28290298642 in words is "twenty-eight billion, two hundred ninety million, two hundred ninety-eight thousand, six hundred forty-two".