28149948 has 36 divisors (see below), whose sum is σ = 72021768. Its totient is φ = 9269280.

The previous prime is 28149941. The next prime is 28149949. The reversal of 28149948 is 84994182.

It is a tau number, because it is divible by the number of its divisors (36).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (28149941) by changing a digit.

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 in 11 ways as a sum of consecutive naturals, for example, 1723 + ... + 7698.

Almost surely, 2^28149948 is an apocalyptic number.

It is an amenable number.

28149948 is an abundant number, since it is smaller than the sum of its proper divisors (43871820).

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

28149948 is a wasteful number, since it uses less digits than its factorization.

28149948 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 9514 (or 9509 counting only the distinct ones).

The product of its digits is 165888, while the sum is 45.

The square root of 28149948 is about 5305.6524575211. The cubic root of 28149948 is about 304.1999924787.

The spelling of 28149948 in words is "twenty-eight million, one hundred forty-nine thousand, nine hundred forty-eight".