28994778358 has 32 divisors (see below), whose sum is σ = 53827925760. Its totient is φ = 11406368160.

The previous prime is 28994778343. The next prime is 28994778391. The reversal of 28994778358 is 85387749982.

It is a congruent number.

It is an unprimeable number.

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 in 15 ways as a sum of consecutive naturals, for example, 412428 + ... + 477583.

It is an arithmetic number, because the mean of its divisors is an integer number (1682122680).

Almost surely, 2^28994778358 is an apocalyptic number.

28994778358 is a deficient number, since it is larger than the sum of its proper divisors (24833147402).

28994778358 is a wasteful number, since it uses less digits than its factorization.

28994778358 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 890212.

The product of its digits is 243855360, while the sum is 70.

The spelling of 28994778358 in words is "twenty-eight billion, nine hundred ninety-four million, seven hundred seventy-eight thousand, three hundred fifty-eight".