28070504 has 32 divisors (see below), whose sum is σ = 65620800. Its totient is φ = 10936320.

The previous prime is 28070503. The next prime is 28070509. The reversal of 28070504 is 40507082.

It is not an unprimeable number, because it can be changed into a prime (28070503) 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 7 ways as a sum of consecutive naturals, for example, 22169 + ... + 23400.

It is an arithmetic number, because the mean of its divisors is an integer number (2050650).

Almost surely, 2^28070504 is an apocalyptic number.

It is an amenable number.

28070504 is an abundant number, since it is smaller than the sum of its proper divisors (37550296).

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

28070504 is a wasteful number, since it uses less digits than its factorization.

28070504 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 45593 (or 45589 counting only the distinct ones).

The product of its (nonzero) digits is 2240, while the sum is 26.

The square root of 28070504 is about 5298.1604354719. The cubic root of 28070504 is about 303.9135545989.

Adding to 28070504 its reverse (40507082), we get a palindrome (68577586).

The spelling of 28070504 in words is "twenty-eight million, seventy thousand, five hundred four".