28947677 has 6 divisors (see below), whose sum is σ = 31818654. Its totient is φ = 26315960.

The previous prime is 28947671. The next prime is 28947691. The reversal of 28947677 is 77674982.

It can be written as a sum of positive squares in only one way, i.e., 24393721 + 4553956 = 4939^2 + 2134^2 .

It is not a de Polignac number, because 28947677 - 2⁸ = 28947421 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 (28947671) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 119498 + ... + 119739.

It is an arithmetic number, because the mean of its divisors is an integer number (5303109).

Almost surely, 2^28947677 is an apocalyptic number.

It is an amenable number.

28947677 is a deficient number, since it is larger than the sum of its proper divisors (2870977).

28947677 is a wasteful number, since it uses less digits than its factorization.

28947677 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 239259 (or 239248 counting only the distinct ones).

The product of its digits is 1185408, while the sum is 50.

The square root of 28947677 is about 5380.3045452837. The cubic root of 28947677 is about 307.0467979602.

The spelling of 28947677 in words is "twenty-eight million, nine hundred forty-seven thousand, six hundred seventy-seven".