28156344 has 16 divisors (see below), whose sum is σ = 70390920. Its totient is φ = 9385440.

The previous prime is 28156343. The next prime is 28156363. The reversal of 28156344 is 44365182.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (28156343) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 586567 + ... + 586614.

Almost surely, 2^28156344 is an apocalyptic number.

28156344 is a gapful number since it is divisible by the number (24) formed by its first and last digit.

It is an amenable number.

28156344 is an abundant number, since it is smaller than the sum of its proper divisors (42234576).

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

28156344 is a wasteful number, since it uses less digits than its factorization.

28156344 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1173190 (or 1173186 counting only the distinct ones).

The product of its digits is 23040, while the sum is 33.

The square root of 28156344 is about 5306.2551766759. The cubic root of 28156344 is about 304.2230300087.

The spelling of 28156344 in words is "twenty-eight million, one hundred fifty-six thousand, three hundred forty-four".