28677561 has 8 divisors (see below), whose sum is σ = 41712864. Its totient is φ = 17380320.

The previous prime is 28677559. The next prime is 28677563. The reversal of 28677561 is 16577682.

It is an interprime number because it is at equal distance from previous prime (28677559) and next prime (28677563).

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

It is not a de Polignac number, because 28677561 - 2¹ = 28677559 is a prime.

It is not an unprimeable number, because it can be changed into a prime (28677563) 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, 434476 + ... + 434541.

It is an arithmetic number, because the mean of its divisors is an integer number (5214108).

Almost surely, 2^28677561 is an apocalyptic number.

It is an amenable number.

28677561 is a deficient number, since it is larger than the sum of its proper divisors (13035303).

28677561 is a wasteful number, since it uses less digits than its factorization.

28677561 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 869031.

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

The square root of 28677561 is about 5355.1434154465. The cubic root of 28677561 is about 306.0887755580.

The spelling of 28677561 in words is "twenty-eight million, six hundred seventy-seven thousand, five hundred sixty-one".