28609948 has 6 divisors (see below), whose sum is σ = 50067416. Its totient is φ = 14304972.

The previous prime is 28609883. The next prime is 28609957. The reversal of 28609948 is 84990682.

It is a junction number, because it is equal to n+sod(n) for n = 28609898 and 28609907.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 3576240 + ... + 3576247.

Almost surely, 2^28609948 is an apocalyptic number.

It is an amenable number.

28609948 is a deficient number, since it is larger than the sum of its proper divisors (21457468).

28609948 is a wasteful number, since it uses less digits than its factorization.

28609948 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7152491 (or 7152489 counting only the distinct ones).

The product of its (nonzero) digits is 248832, while the sum is 46.

The square root of 28609948 is about 5348.8267872497. The cubic root of 28609948 is about 305.8480313939.

The spelling of 28609948 in words is "twenty-eight million, six hundred nine thousand, nine hundred forty-eight".