28197630 has 24 divisors (see below), whose sum is σ = 73314072. Its totient is φ = 7519344.

The previous prime is 28197629. The next prime is 28197641. The reversal of 28197630 is 3679182.

28197630 is a `hidden beast` number, since 2 + 8 + 19 + 7 + 630 = 666.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 156564 + ... + 156743.

It is an arithmetic number, because the mean of its divisors is an integer number (3054753).

Almost surely, 2^28197630 is an apocalyptic number.

28197630 is an abundant number, since it is smaller than the sum of its proper divisors (45116442).

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

28197630 is a wasteful number, since it uses less digits than its factorization.

28197630 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 313320 (or 313317 counting only the distinct ones).

The product of its (nonzero) digits is 18144, while the sum is 36.

The square root of 28197630 is about 5310.1440658423. The cubic root of 28197630 is about 304.3716527368.

The spelling of 28197630 in words is "twenty-eight million, one hundred ninety-seven thousand, six hundred thirty".