28616577 has 32 divisors (see below), whose sum is σ = 44651520. Its totient is φ = 16125120.

The previous prime is 28616573. The next prime is 28616579. The reversal of 28616577 is 77561682.

It is not a de Polignac number, because 28616577 - 2² = 28616573 is a prime.

It is not an unprimeable number, because it can be changed into a prime (28616573) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 27574 + ... + 28592.

It is an arithmetic number, because the mean of its divisors is an integer number (1395360).

Almost surely, 2^28616577 is an apocalyptic number.

It is an amenable number.

28616577 is a deficient number, since it is larger than the sum of its proper divisors (16034943).

28616577 is a wasteful number, since it uses less digits than its factorization.

28616577 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1093.

The product of its digits is 141120, while the sum is 42.

The square root of 28616577 is about 5349.4464199579. The cubic root of 28616577 is about 305.8716515001.

It can be divided in two parts, 28 and 616577, that added together give a triangular number (616605 = T₁₁₁₀).

The spelling of 28616577 in words is "twenty-eight million, six hundred sixteen thousand, five hundred seventy-seven".