28292040 has 192 divisors, whose sum is σ = 107078400. Its totient is φ = 6345216.

The previous prime is 28292003. The next prime is 28292053. The reversal of 28292040 is 4029282.

It is a junction number, because it is equal to n+sod(n) for n = 28291995 and 28292013.

It is an unprimeable number.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 259506 + ... + 259614.

It is an arithmetic number, because the mean of its divisors is an integer number (557700).

Almost surely, 2^28292040 is an apocalyptic number.

28292040 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 28292040, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (53539200).

28292040 is an abundant number, since it is smaller than the sum of its proper divisors (78786360).

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

28292040 is a wasteful number, since it uses less digits than its factorization.

28292040 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 236 (or 229 counting only the distinct ones).

The product of its (nonzero) digits is 2304, while the sum is 27.

The square root of 28292040 is about 5319.0262266697. The cubic root of 28292040 is about 304.7109686854.

The spelling of 28292040 in words is "twenty-eight million, two hundred ninety-two thousand, forty".