28539948 has 48 divisors (see below), whose sum is σ = 68440064. Its totient is φ = 9253440.

The previous prime is 28539947. The next prime is 28539949. The reversal of 28539948 is 84993582.

It is an interprime number because it is at equal distance from previous prime (28539947) and next prime (28539949).

It is a junction number, because it is equal to n+sod(n) for n = 28539897 and 28539906.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (28539947) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 92811 + ... + 93117.

Almost surely, 2^28539948 is an apocalyptic number.

It is an amenable number.

28539948 is an abundant number, since it is smaller than the sum of its proper divisors (39900116).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

28539948 is a wasteful number, since it uses less digits than its factorization.

28539948 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 502 (or 500 counting only the distinct ones).

The product of its digits is 622080, while the sum is 48.

The square root of 28539948 is about 5342.2792888429. The cubic root of 28539948 is about 305.5983880794.

The spelling of 28539948 in words is "twenty-eight million, five hundred thirty-nine thousand, nine hundred forty-eight".