28478551045 has 32 divisors (see below), whose sum is σ = 41411865600. Its totient is φ = 18353596416.

The previous prime is 28478551039. The next prime is 28478551069. The reversal of 28478551045 is 54015587482.

It is a cyclic number.

It is not a de Polignac number, because 28478551045 - 2³ = 28478551037 is a prime.

It is a super-2 number, since 2×28478551045² (a number of 22 digits) contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 28478551045.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 394521 + ... + 461089.

It is an arithmetic number, because the mean of its divisors is an integer number (1294120800).

Almost surely, 2^28478551045 is an apocalyptic number.

It is an amenable number.

28478551045 is a deficient number, since it is larger than the sum of its proper divisors (12933314555).

28478551045 is a wasteful number, since it uses less digits than its factorization.

28478551045 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 67317.

The product of its (nonzero) digits is 1792000, while the sum is 49.

The spelling of 28478551045 in words is "twenty-eight billion, four hundred seventy-eight million, five hundred fifty-one thousand, forty-five".