28040922 has 192 divisors, whose sum is σ = 84913920. Its totient is φ = 6469632.

The previous prime is 28040917. The next prime is 28040927. The reversal of 28040922 is 22904082.

It is an interprime number because it is at equal distance from previous prime (28040917) and next prime (28040927).

It is a super-2 number, since 2×28040922² = 1572586613220168, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (28040927) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 95 ways as a sum of consecutive naturals, for example, 529048 + ... + 529100.

It is an arithmetic number, because the mean of its divisors is an integer number (442260).

Almost surely, 2^28040922 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 28040922, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (42456960).

28040922 is an abundant number, since it is smaller than the sum of its proper divisors (56872998).

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

28040922 is a wasteful number, since it uses less digits than its factorization.

28040922 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 117 (or 114 counting only the distinct ones).

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

The square root of 28040922 is about 5295.3679758823. The cubic root of 28040922 is about 303.8067576710.

The spelling of 28040922 in words is "twenty-eight million, forty thousand, nine hundred twenty-two".