28623281845 has 16 divisors (see below), whose sum is σ = 35863067520. Its totient is φ = 21889747264.

The previous prime is 28623281839. The next prime is 28623281867. The reversal of 28623281845 is 54818232682.

It is a happy number.

It is a cyclic number.

It is not a de Polignac number, because 28623281845 - 2¹⁵ = 28623249077 is a prime.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 117051 + ... + 266359.

It is an arithmetic number, because the mean of its divisors is an integer number (2241441720).

Almost surely, 2^28623281845 is an apocalyptic number.

It is an amenable number.

28623281845 is a deficient number, since it is larger than the sum of its proper divisors (7239785675).

28623281845 is a wasteful number, since it uses less digits than its factorization.

28623281845 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 151004.

The product of its digits is 1474560, while the sum is 49.

The spelling of 28623281845 in words is "twenty-eight billion, six hundred twenty-three million, two hundred eighty-one thousand, eight hundred forty-five".