28623156 has 12 divisors (see below), whose sum is σ = 66787392. Its totient is φ = 9541048.

The previous prime is 28623151. The next prime is 28623157. The reversal of 28623156 is 65132682.

It is a tau number, because it is divible by the number of its divisors (12).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (28623151) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1192620 + ... + 1192643.

It is an arithmetic number, because the mean of its divisors is an integer number (5565616).

Almost surely, 2^28623156 is an apocalyptic number.

It is an amenable number.

28623156 is an abundant number, since it is smaller than the sum of its proper divisors (38164236).

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

28623156 is a wasteful number, since it uses less digits than its factorization.

28623156 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2385270 (or 2385268 counting only the distinct ones).

The product of its digits is 17280, while the sum is 33.

The square root of 28623156 is about 5350.0613080599. The cubic root of 28623156 is about 305.8950898426.

The spelling of 28623156 in words is "twenty-eight million, six hundred twenty-three thousand, one hundred fifty-six".