28013948 has 6 divisors (see below), whose sum is σ = 49024416. Its totient is φ = 14006972.

The previous prime is 28013939. The next prime is 28013959. The reversal of 28013948 is 84931082.

It is a happy 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, 3501740 + ... + 3501747.

It is an arithmetic number, because the mean of its divisors is an integer number (8170736).

Almost surely, 2^28013948 is an apocalyptic number.

It is an amenable number.

28013948 is a deficient number, since it is larger than the sum of its proper divisors (21010468).

28013948 is a wasteful number, since it uses less digits than its factorization.

28013948 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7003491 (or 7003489 counting only the distinct ones).

The product of its (nonzero) digits is 13824, while the sum is 35.

The square root of 28013948 is about 5292.8204201541. The cubic root of 28013948 is about 303.7093106543.

The spelling of 28013948 in words is "twenty-eight million, thirteen thousand, nine hundred forty-eight".