28661774 has 4 divisors (see below), whose sum is σ = 42992664. Its totient is φ = 14330886.

The previous prime is 28661713. The next prime is 28661783. The reversal of 28661774 is 47716682.

It is a semiprime because it is the product of two primes.

It is a Curzon number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 7165442 + ... + 7165445.

It is an arithmetic number, because the mean of its divisors is an integer number (10748166).

Almost surely, 2^28661774 is an apocalyptic number.

28661774 is a deficient number, since it is larger than the sum of its proper divisors (14330890).

28661774 is a wasteful number, since it uses less digits than its factorization.

28661774 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 14330889.

The product of its digits is 112896, while the sum is 41.

The square root of 28661774 is about 5353.6692090565. The cubic root of 28661774 is about 306.0325979483.

The spelling of 28661774 in words is "twenty-eight million, six hundred sixty-one thousand, seven hundred seventy-four".