28615790045 has 4 divisors (see below), whose sum is σ = 34338948060. Its totient is φ = 22892632032.

The previous prime is 28615790011. The next prime is 28615790053. The reversal of 28615790045 is 54009751682.

It is a happy number.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 11810038276 + 16805751769 = 108674^2 + 129637^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-28615790045 is a prime.

It is a super-2 number, since 2×28615790045² (a number of 22 digits) contains 22 as substring.

It is a congruent number.

It is an unprimeable number.

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 3 ways as a sum of consecutive naturals, for example, 2861579000 + ... + 2861579009.

It is an arithmetic number, because the mean of its divisors is an integer number (8584737015).

Almost surely, 2^28615790045 is an apocalyptic number.

It is an amenable number.

28615790045 is a deficient number, since it is larger than the sum of its proper divisors (5723158015).

28615790045 is an equidigital number, since it uses as much as digits as its factorization.

28615790045 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5723158014.

The product of its (nonzero) digits is 604800, while the sum is 47.

The spelling of 28615790045 in words is "twenty-eight billion, six hundred fifteen million, seven hundred ninety thousand, forty-five".