28966140 has 192 divisors, whose sum is σ = 105369600. Its totient is φ = 6469632.

The previous prime is 28966129. The next prime is 28966169. The reversal of 28966140 is 4166982.

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

It is a junction number, because it is equal to n+sod(n) for n = 28966095 and 28966104.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 298572 + ... + 298668.

It is an arithmetic number, because the mean of its divisors is an integer number (548800).

Almost surely, 2^28966140 is an apocalyptic number.

28966140 is a gapful number since it is divisible by the number (20) 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 28966140, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (52684800).

28966140 is an abundant number, since it is smaller than the sum of its proper divisors (76403460).

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

28966140 is a wasteful number, since it uses less digits than its factorization.

28966140 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 201 (or 193 counting only the distinct ones).

The product of its (nonzero) digits is 20736, while the sum is 36.

The square root of 28966140 is about 5382.0200668522. The cubic root of 28966140 is about 307.1120628428.

The spelling of 28966140 in words is "twenty-eight million, nine hundred sixty-six thousand, one hundred forty".