28345461945 has 32 divisors (see below), whose sum is σ = 46336762368. Its totient is φ = 14789837568.

The previous prime is 28345461899. The next prime is 28345461959. The reversal of 28345461945 is 54916454382.

It is a happy number.

It is not a de Polignac number, because 28345461945 - 2⁷ = 28345461817 is a prime.

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, 2077887 + ... + 2091483.

It is an arithmetic number, because the mean of its divisors is an integer number (1448023824).

Almost surely, 2^28345461945 is an apocalyptic number.

It is an amenable number.

28345461945 is a deficient number, since it is larger than the sum of its proper divisors (17991300423).

28345461945 is a wasteful number, since it uses less digits than its factorization.

28345461945 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 16609.

The product of its digits is 4147200, while the sum is 51.

The spelling of 28345461945 in words is "twenty-eight billion, three hundred forty-five million, four hundred sixty-one thousand, nine hundred forty-five".