28977977 has 16 divisors (see below), whose sum is σ = 33770880. Its totient is φ = 24354432.

The previous prime is 28977943. The next prime is 28978003. The reversal of 28977977 is 77977982.

It is a cyclic number.

It is not a de Polignac number, because 28977977 - 2⁸ = 28977721 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (28977937) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 124253 + ... + 124485.

It is an arithmetic number, because the mean of its divisors is an integer number (2110680).

Almost surely, 2^28977977 is an apocalyptic number.

It is an amenable number.

28977977 is a deficient number, since it is larger than the sum of its proper divisors (4792903).

28977977 is a wasteful number, since it uses less digits than its factorization.

28977977 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 512.

The product of its digits is 3111696, while the sum is 56.

The square root of 28977977 is about 5383.1196345614. The cubic root of 28977977 is about 307.1538908808.

The spelling of 28977977 in words is "twenty-eight million, nine hundred seventy-seven thousand, nine hundred seventy-seven".