28777344 has 32 divisors (see below), whose sum is σ = 76440840. Its totient is φ = 9592320.

The previous prime is 28777337. The next prime is 28777361. The reversal of 28777344 is 44377782.

It is a tau number, because it is divible by the number of its divisors (32).

It is a Smith number, since the sum of its digits (42) coincides with the sum of the digits of its prime factors.

It is a junction number, because it is equal to n+sod(n) for n = 28777296 and 28777305.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 37087 + ... + 37854.

Almost surely, 2^28777344 is an apocalyptic number.

28777344 is a gapful number since it is divisible by the number (24) formed by its first and last digit.

It is an amenable number.

28777344 is an abundant number, since it is smaller than the sum of its proper divisors (47663496).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

28777344 is an equidigital number, since it uses as much as digits as its factorization.

28777344 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 74958 (or 74946 counting only the distinct ones).

The product of its digits is 263424, while the sum is 42.

The square root of 28777344 is about 5364.4518825319. The cubic root of 28777344 is about 306.4433745266.

The spelling of 28777344 in words is "twenty-eight million, seven hundred seventy-seven thousand, three hundred forty-four".