28072370 has 16 divisors (see below), whose sum is σ = 50594328. Its totient is φ = 11214720.

The previous prime is 28072361. The next prime is 28072379. The reversal of 28072370 is 7327082.

It is an interprime number because it is at equal distance from previous prime (28072361) and next prime (28072379).

It can be written as a sum of positive squares in 4 ways, for example, as 26081449 + 1990921 = 5107^2 + 1411^2 .

It is not an unprimeable number, because it can be changed into a prime (28072379) 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, 10622 + ... + 12998.

Almost surely, 2^28072370 is an apocalyptic number.

28072370 is a deficient number, since it is larger than the sum of its proper divisors (22521958).

28072370 is a wasteful number, since it uses less digits than its factorization.

28072370 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3565.

The product of its (nonzero) digits is 4704, while the sum is 29.

The square root of 28072370 is about 5298.3365314030. The cubic root of 28072370 is about 303.9202887154.

The spelling of 28072370 in words is "twenty-eight million, seventy-two thousand, three hundred seventy".