28904148 has 192 divisors, whose sum is σ = 98219520. Its totient is φ = 7133184.

The previous prime is 28904147. The next prime is 28904173. The reversal of 28904148 is 84140982.

It is a Harshad number since it is a multiple of its sum of digits (36).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (28904147) by changing a digit.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 166990 + ... + 167162.

It is an arithmetic number, because the mean of its divisors is an integer number (511560).

Almost surely, 2^28904148 is an apocalyptic number.

28904148 is a gapful number since it is divisible by the number (28) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 28904148, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (49109760).

28904148 is an abundant number, since it is smaller than the sum of its proper divisors (69315372).

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

28904148 is a wasteful number, since it uses less digits than its factorization.

28904148 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 223 (or 215 counting only the distinct ones).

The product of its (nonzero) digits is 18432, while the sum is 36.

The square root of 28904148 is about 5376.2578063184. The cubic root of 28904148 is about 306.8928173267.

The spelling of 28904148 in words is "twenty-eight million, nine hundred four thousand, one hundred forty-eight".