28961677 has 4 divisors (see below), whose sum is σ = 29139520. Its totient is φ = 28783836.

The previous prime is 28961617. The next prime is 28961683. The reversal of 28961677 is 77616982.

It is a happy number.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 28961677 - 2⁷ = 28961549 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (28961617) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 88677 + ... + 89002.

It is an arithmetic number, because the mean of its divisors is an integer number (7284880).

Almost surely, 2^28961677 is an apocalyptic number.

It is an amenable number.

28961677 is a deficient number, since it is larger than the sum of its proper divisors (177843).

28961677 is a wasteful number, since it uses less digits than its factorization.

28961677 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 177842.

The product of its digits is 254016, while the sum is 46.

The square root of 28961677 is about 5381.6054296093. The cubic root of 28961677 is about 307.0962891206.

The spelling of 28961677 in words is "twenty-eight million, nine hundred sixty-one thousand, six hundred seventy-seven".