28355958394 has 4 divisors (see below), whose sum is σ = 42533937594. Its totient is φ = 14177979196.

The previous prime is 28355958341. The next prime is 28355958427. The reversal of 28355958394 is 49385955382.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in only one way, i.e., 27753894025 + 602064369 = 166595^2 + 24537^2 .

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 7088989597 + ... + 7088989600.

Almost surely, 2^28355958394 is an apocalyptic number.

28355958394 is a deficient number, since it is larger than the sum of its proper divisors (14177979200).

28355958394 is a wasteful number, since it uses less digits than its factorization.

28355958394 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 14177979199.

The product of its digits is 46656000, while the sum is 61.

The spelling of 28355958394 in words is "twenty-eight billion, three hundred fifty-five million, nine hundred fifty-eight thousand, three hundred ninety-four".