28727701394 has 32 divisors (see below), whose sum is σ = 50593718016. Its totient is φ = 11975515200.

The previous prime is 28727701381. The next prime is 28727701399. The reversal of 28727701394 is 49310772782.

It is a happy number.

It is not an unprimeable number, because it can be changed into a prime (28727701399) 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 in 15 ways as a sum of consecutive naturals, for example, 2367944 + ... + 2380044.

It is an arithmetic number, because the mean of its divisors is an integer number (1581053688).

Almost surely, 2^28727701394 is an apocalyptic number.

28727701394 is a deficient number, since it is larger than the sum of its proper divisors (21866016622).

28727701394 is a wasteful number, since it uses less digits than its factorization.

28727701394 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 16730.

The product of its (nonzero) digits is 1185408, while the sum is 50.

The spelling of 28727701394 in words is "twenty-eight billion, seven hundred twenty-seven million, seven hundred one thousand, three hundred ninety-four".