28735146 has 48 divisors (see below), whose sum is σ = 68627520. Its totient is φ = 8616960.

The previous prime is 28735141. The next prime is 28735193. The reversal of 28735146 is 64153782.

It is a Curzon number.

It is a self number, because there is not a number n which added to its sum of digits gives 28735146.

It is not an unprimeable number, because it can be changed into a prime (28735141) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 19690 + ... + 21098.

It is an arithmetic number, because the mean of its divisors is an integer number (1429740).

Almost surely, 2^28735146 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 28735146, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (34313760).

28735146 is an abundant number, since it is smaller than the sum of its proper divisors (39892374).

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

28735146 is a wasteful number, since it uses less digits than its factorization.

28735146 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1531 (or 1528 counting only the distinct ones).

The product of its digits is 40320, while the sum is 36.

The square root of 28735146 is about 5360.5173257812. The cubic root of 28735146 is about 306.2935156268.

The spelling of 28735146 in words is "twenty-eight million, seven hundred thirty-five thousand, one hundred forty-six".