28195040 has 48 divisors (see below), whose sum is σ = 66942288. Its totient is φ = 11222016.

The previous prime is 28195039. The next prime is 28195043. The reversal of 28195040 is 4059182.

It is a junction number, because it is equal to n+sod(n) for n = 28194994 and 28195012.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (28195043) 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, 49799 + ... + 50361.

It is an arithmetic number, because the mean of its divisors is an integer number (1394631).

Almost surely, 2^28195040 is an apocalyptic number.

28195040 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 28195040, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (33471144).

28195040 is an abundant number, since it is smaller than the sum of its proper divisors (38747248).

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

28195040 is a wasteful number, since it uses less digits than its factorization.

28195040 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 891 (or 883 counting only the distinct ones).

The product of its (nonzero) digits is 2880, while the sum is 29.

The square root of 28195040 is about 5309.9001873858. The cubic root of 28195040 is about 304.3623334345.

The spelling of 28195040 in words is "twenty-eight million, one hundred ninety-five thousand, forty".