28156650 has 24 divisors (see below), whose sum is σ = 69828864. Its totient is φ = 7508400.

The previous prime is 28156643. The next prime is 28156657. The reversal of 28156650 is 5665182.

It is an interprime number because it is at equal distance from previous prime (28156643) and next prime (28156657).

It is not an unprimeable number, because it can be changed into a prime (28156657) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 93706 + ... + 94005.

It is an arithmetic number, because the mean of its divisors is an integer number (2909536).

Almost surely, 2^28156650 is an apocalyptic number.

28156650 is an abundant number, since it is smaller than the sum of its proper divisors (41672214).

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

28156650 is a wasteful number, since it uses less digits than its factorization.

28156650 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 187726 (or 187721 counting only the distinct ones).

The product of its (nonzero) digits is 14400, while the sum is 33.

The square root of 28156650 is about 5306.2840104917. The cubic root of 28156650 is about 304.2241320920.

The spelling of 28156650 in words is "twenty-eight million, one hundred fifty-six thousand, six hundred fifty".