28070253 has 32 divisors (see below), whose sum is σ = 43084800. Its totient is φ = 18052848.

The previous prime is 28070249. The next prime is 28070257. The reversal of 28070253 is 35207082.

It is an interprime number because it is at equal distance from previous prime (28070249) and next prime (28070257).

It is not a de Polignac number, because 28070253 - 2² = 28070249 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (27).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (28070257) 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 31 ways as a sum of consecutive naturals, for example, 106600 + ... + 106862.

It is an arithmetic number, because the mean of its divisors is an integer number (1346400).

Almost surely, 2^28070253 is an apocalyptic number.

It is an amenable number.

28070253 is a deficient number, since it is larger than the sum of its proper divisors (15014547).

28070253 is a wasteful number, since it uses less digits than its factorization.

28070253 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 398 (or 392 counting only the distinct ones).

The product of its (nonzero) digits is 3360, while the sum is 27.

The square root of 28070253 is about 5298.1367479521. The cubic root of 28070253 is about 303.9126487545.

The spelling of 28070253 in words is "twenty-eight million, seventy thousand, two hundred fifty-three".