28741438090 has 16 divisors (see below), whose sum is σ = 52443282888. Its totient is φ = 11339087616.

The previous prime is 28741438087. The next prime is 28741438129. The reversal of 28741438090 is 9083414782.

It is a Cunningham number, because it is equal to 169533²+1.

It can be written as a sum of positive squares in 4 ways, for example, as 16315208361 + 12426229729 = 127731^2 + 111473^2 .

It is a self number, because there is not a number n which added to its sum of digits gives 28741438090.

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 7 ways as a sum of consecutive naturals, for example, 19685187 + ... + 19686646.

Almost surely, 2^28741438090 is an apocalyptic number.

28741438090 is a deficient number, since it is larger than the sum of its proper divisors (23701844798).

28741438090 is a wasteful number, since it uses less digits than its factorization.

28741438090 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 39371913.

The product of its (nonzero) digits is 387072, while the sum is 46.

The spelling of 28741438090 in words is "twenty-eight billion, seven hundred forty-one million, four hundred thirty-eight thousand, ninety".