28177948 has 6 divisors (see below), whose sum is σ = 49311416. Its totient is φ = 14088972.

The previous prime is 28177939. The next prime is 28177949. The reversal of 28177948 is 84977182.

It is a junction number, because it is equal to n+sod(n) for n = 28177898 and 28177907.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (28177949) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 3522240 + ... + 3522247.

Almost surely, 2^28177948 is an apocalyptic number.

It is an amenable number.

28177948 is a deficient number, since it is larger than the sum of its proper divisors (21133468).

28177948 is a wasteful number, since it uses less digits than its factorization.

28177948 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7044491 (or 7044489 counting only the distinct ones).

The product of its digits is 225792, while the sum is 46.

The square root of 28177948 is about 5308.2904969491. The cubic root of 28177948 is about 304.3008189204.

The spelling of 28177948 in words is "twenty-eight million, one hundred seventy-seven thousand, nine hundred forty-eight".