28397730514 has 4 divisors (see below), whose sum is σ = 42596595774. Its totient is φ = 14198865256.

The previous prime is 28397730499. The next prime is 28397730533. The reversal of 28397730514 is 41503779382.

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., 22630087489 + 5767643025 = 150433^2 + 75945^2 .

It is an unprimeable number.

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, 7099432627 + ... + 7099432630.

Almost surely, 2^28397730514 is an apocalyptic number.

28397730514 is a deficient number, since it is larger than the sum of its proper divisors (14198865260).

28397730514 is a wasteful number, since it uses less digits than its factorization.

28397730514 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 14198865259.

The product of its (nonzero) digits is 1270080, while the sum is 49.

The spelling of 28397730514 in words is "twenty-eight billion, three hundred ninety-seven million, seven hundred thirty thousand, five hundred fourteen".