28877776 has 20 divisors (see below), whose sum is σ = 57316644. Its totient is φ = 14086400.

The previous prime is 28877753. The next prime is 28877809. The reversal of 28877776 is 67777882.

It can be written as a sum of positive squares in 2 ways, for example, as 5645376 + 23232400 = 2376^2 + 4820^2 .

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, 21355 + ... + 22666.

Almost surely, 2^28877776 is an apocalyptic number.

It is an amenable number.

28877776 is a deficient number, since it is larger than the sum of its proper divisors (28438868).

28877776 is a wasteful number, since it uses less digits than its factorization.

28877776 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 44070 (or 44064 counting only the distinct ones).

The product of its digits is 1843968, while the sum is 52.

The square root of 28877776 is about 5373.8046112601. The cubic root of 28877776 is about 306.7994531023.

The spelling of 28877776 in words is "twenty-eight million, eight hundred seventy-seven thousand, seven hundred seventy-six".