28642615090 has 16 divisors (see below), whose sum is σ = 51576636888. Its totient is φ = 11452617216.

The previous prime is 28642615073. The next prime is 28642615091. The reversal of 28642615090 is 9051624682.

It can be written as a sum of positive squares in 4 ways, for example, as 18582324489 + 10060290601 = 136317^2 + 100301^2 .

It is not an unprimeable number, because it can be changed into a prime (28642615091) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 526377 + ... + 578236.

Almost surely, 2^28642615090 is an apocalyptic number.

28642615090 is a deficient number, since it is larger than the sum of its proper divisors (22934021798).

28642615090 is a wasteful number, since it uses less digits than its factorization.

28642615090 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1107213.

The product of its (nonzero) digits is 207360, while the sum is 43.

The spelling of 28642615090 in words is "twenty-eight billion, six hundred forty-two million, six hundred fifteen thousand, ninety".