28929948 has 12 divisors (see below), whose sum is σ = 67503240. Its totient is φ = 9643312.

The previous prime is 28929889. The next prime is 28929977. The reversal of 28929948 is 84992982.

It is a tau number, because it is divible by the number of its divisors (12).

It is a self number, because there is not a number n which added to its sum of digits gives 28929948.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1205403 + ... + 1205426.

It is an arithmetic number, because the mean of its divisors is an integer number (5625270).

Almost surely, 2^28929948 is an apocalyptic number.

It is an amenable number.

28929948 is an abundant number, since it is smaller than the sum of its proper divisors (38573292).

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

28929948 is a wasteful number, since it uses less digits than its factorization.

28929948 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2410836 (or 2410834 counting only the distinct ones).

The product of its digits is 746496, while the sum is 51.

The square root of 28929948 is about 5378.6567096256. The cubic root of 28929948 is about 306.9841015721.

The spelling of 28929948 in words is "twenty-eight million, nine hundred twenty-nine thousand, nine hundred forty-eight".