28358118405 has 24 divisors (see below), whose sum is σ = 49512871512. Its totient is φ = 15013929984.

The previous prime is 28358118377. The next prime is 28358118419. The reversal of 28358118405 is 50481185382.

28358118405 is a `hidden beast` number, since 2 + 83 + 58 + 118 + 405 = 666.

It can be written as a sum of positive squares in 4 ways, for example, as 9998244 + 28348120161 = 3162^2 + 168369^2 .

It is not a de Polignac number, because 28358118405 - 2²³ = 28349729797 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (45).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 2293764 + ... + 2306093.

It is an arithmetic number, because the mean of its divisors is an integer number (2063036313).

Almost surely, 2^28358118405 is an apocalyptic number.

It is an amenable number.

28358118405 is a deficient number, since it is larger than the sum of its proper divisors (21154753107).

28358118405 is a wasteful number, since it uses less digits than its factorization.

28358118405 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4600005 (or 4600002 counting only the distinct ones).

The product of its (nonzero) digits is 307200, while the sum is 45.

The spelling of 28358118405 in words is "twenty-eight billion, three hundred fifty-eight million, one hundred eighteen thousand, four hundred five".