28070004 has 48 divisors (see below), whose sum is σ = 68773376. Its totient is φ = 8899200.

The previous prime is 28069997. The next prime is 28070047. The reversal of 28070004 is 40007082.

It is a happy number.

It is a congruent number.

It is an unprimeable number.

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 15 ways as a sum of consecutive naturals, for example, 22074 + ... + 23310.

Almost surely, 2^28070004 is an apocalyptic number.

It is an amenable number.

28070004 is an abundant number, since it is smaller than the sum of its proper divisors (40703372).

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

28070004 is a wasteful number, since it uses less digits than its factorization.

28070004 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1336 (or 1334 counting only the distinct ones).

The product of its (nonzero) digits is 448, while the sum is 21.

The square root of 28070004 is about 5298.1132490727. The cubic root of 28070004 is about 303.9117501226.

Adding to 28070004 its reverse (40007082), we get a palindrome (68077086).

The spelling of 28070004 in words is "twenty-eight million, seventy thousand, four".