28070481 has 4 divisors (see below), whose sum is σ = 37427312. Its totient is φ = 18713652.

The previous prime is 28070459. The next prime is 28070491. The reversal of 28070481 is 18407082.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is not a de Polignac number, because 28070481 - 2¹³ = 28062289 is a prime.

It is a super-2 number, since 2×28070481² = 1575903807142722, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (28070411) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 4678411 + ... + 4678416.

It is an arithmetic number, because the mean of its divisors is an integer number (9356828).

Almost surely, 2^28070481 is an apocalyptic number.

It is an amenable number.

28070481 is a deficient number, since it is larger than the sum of its proper divisors (9356831).

28070481 is an equidigital number, since it uses as much as digits as its factorization.

28070481 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 9356830.

The product of its (nonzero) digits is 3584, while the sum is 30.

The square root of 28070481 is about 5298.1582649068. The cubic root of 28070481 is about 303.9134715935.

The spelling of 28070481 in words is "twenty-eight million, seventy thousand, four hundred eighty-one".