28504779446 has 48 divisors (see below), whose sum is σ = 50583191040. Its totient is φ = 11942292960.

The previous prime is 28504779437. The next prime is 28504779467. The reversal of 28504779446 is 64497740582.

It is a happy number.

It is a junction number, because it is equal to n+sod(n) for n = 28504779391 and 28504779400.

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, 2667911 + ... + 2678573.

It is an arithmetic number, because the mean of its divisors is an integer number (1053816480).

Almost surely, 2^28504779446 is an apocalyptic number.

28504779446 is a gapful number since it is divisible by the number (26) formed by its first and last digit.

28504779446 is a deficient number, since it is larger than the sum of its proper divisors (22078411594).

28504779446 is a wasteful number, since it uses less digits than its factorization.

28504779446 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 11421 (or 11408 counting only the distinct ones).

The product of its (nonzero) digits is 13547520, while the sum is 56.

The spelling of 28504779446 in words is "twenty-eight billion, five hundred four million, seven hundred seventy-nine thousand, four hundred forty-six".