28999046938 has 4 divisors (see below), whose sum is σ = 43498570410. Its totient is φ = 14499523468.

The previous prime is 28999046911. The next prime is 28999046939. The reversal of 28999046938 is 83964099982.

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., 27434290689 + 1564756249 = 165633^2 + 39557^2 .

It is not an unprimeable number, because it can be changed into a prime (28999046939) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 7249761733 + ... + 7249761736.

Almost surely, 2^28999046938 is an apocalyptic number.

28999046938 is a deficient number, since it is larger than the sum of its proper divisors (14499523472).

28999046938 is a wasteful number, since it uses less digits than its factorization.

28999046938 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 14499523471.

The product of its (nonzero) digits is 60466176, while the sum is 67.

The spelling of 28999046938 in words is "twenty-eight billion, nine hundred ninety-nine million, forty-six thousand, nine hundred thirty-eight".