28618977 has 8 divisors (see below), whose sum is σ = 38552416. Its totient is φ = 18882432.

The previous prime is 28618963. The next prime is 28618987. The reversal of 28618977 is 77981682.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 28618977 - 2⁸ = 28618721 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (28618937) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 48883 + ... + 49464.

It is an arithmetic number, because the mean of its divisors is an integer number (4819052).

Almost surely, 2^28618977 is an apocalyptic number.

It is an amenable number.

28618977 is a deficient number, since it is larger than the sum of its proper divisors (9933439).

28618977 is an equidigital number, since it uses as much as digits as its factorization.

28618977 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 98447.

The product of its digits is 338688, while the sum is 48.

The square root of 28618977 is about 5349.6707375314. The cubic root of 28618977 is about 305.8802021552.

The spelling of 28618977 in words is "twenty-eight million, six hundred eighteen thousand, nine hundred seventy-seven".