28431970 has 16 divisors (see below), whose sum is σ = 58488768. Its totient is φ = 9748080.

The previous prime is 28431959. The next prime is 28431971. The reversal of 28431970 is 7913482.

It is not an unprimeable number, because it can be changed into a prime (28431971) 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 7 ways as a sum of consecutive naturals, for example, 203016 + ... + 203155.

It is an arithmetic number, because the mean of its divisors is an integer number (3655548).

Almost surely, 2^28431970 is an apocalyptic number.

28431970 is an abundant number, since it is smaller than the sum of its proper divisors (30056798).

28431970 is a wasteful number, since it uses less digits than its factorization.

28431970 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 406185.

The product of its (nonzero) digits is 12096, while the sum is 34.

The square root of 28431970 is about 5332.1637259184. The cubic root of 28431970 is about 305.2125008407.

The spelling of 28431970 in words is "twenty-eight million, four hundred thirty-one thousand, nine hundred seventy".