28046140 has 24 divisors (see below), whose sum is σ = 59072832. Its totient is φ = 11184960.

The previous prime is 28046119. The next prime is 28046143. The reversal of 28046140 is 4164082.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (28046143) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 5430 + ... + 9250.

It is an arithmetic number, because the mean of its divisors is an integer number (2461368).

Almost surely, 2^28046140 is an apocalyptic number.

28046140 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

28046140 is an abundant number, since it is smaller than the sum of its proper divisors (31026692).

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

28046140 is a wasteful number, since it uses less digits than its factorization.

28046140 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4197 (or 4195 counting only the distinct ones).

The product of its (nonzero) digits is 1536, while the sum is 25.

The square root of 28046140 is about 5295.8606477135. The cubic root of 28046140 is about 303.8256011472.

The spelling of 28046140 in words is "twenty-eight million, forty-six thousand, one hundred forty".