28951530 has 32 divisors (see below), whose sum is σ = 70965504. Its totient is φ = 7555776.

The previous prime is 28951519. The next prime is 28951537. The reversal of 28951530 is 3515982.

It is a Curzon number.

It is a junction number, because it is equal to n+sod(n) for n = 28951491 and 28951500.

It is not an unprimeable number, because it can be changed into a prime (28951537) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 8857 + ... + 11676.

It is an arithmetic number, because the mean of its divisors is an integer number (2217672).

Almost surely, 2^28951530 is an apocalyptic number.

28951530 is an abundant number, since it is smaller than the sum of its proper divisors (42013974).

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

28951530 is a wasteful number, since it uses less digits than its factorization.

28951530 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 20590.

The product of its (nonzero) digits is 10800, while the sum is 33.

The square root of 28951530 is about 5380.6625986025. The cubic root of 28951530 is about 307.0604202258.

The spelling of 28951530 in words is "twenty-eight million, nine hundred fifty-one thousand, five hundred thirty".