28338753434 has 4 divisors (see below), whose sum is σ = 42508130154. Its totient is φ = 14169376716.

The previous prime is 28338753427. The next prime is 28338753437. The reversal of 28338753434 is 43435783382.

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., 22339786225 + 5998967209 = 149465^2 + 77453^2 .

It is not an unprimeable number, because it can be changed into a prime (28338753437) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 7084688357 + ... + 7084688360.

Almost surely, 2^28338753434 is an apocalyptic number.

28338753434 is a deficient number, since it is larger than the sum of its proper divisors (14169376720).

28338753434 is a wasteful number, since it uses less digits than its factorization.

28338753434 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 14169376719.

The product of its digits is 5806080, while the sum is 50.

The spelling of 28338753434 in words is "twenty-eight billion, three hundred thirty-eight million, seven hundred fifty-three thousand, four hundred thirty-four".