28404130402 has 16 divisors (see below), whose sum is σ = 43310620800. Its totient is φ = 13967321040.

The previous prime is 28404130379. The next prime is 28404130423. The reversal of 28404130402 is 20403140482.

It is a happy number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1346049 + ... + 1366987.

It is an arithmetic number, because the mean of its divisors is an integer number (2706913800).

Almost surely, 2^28404130402 is an apocalyptic number.

28404130402 is a deficient number, since it is larger than the sum of its proper divisors (14906490398).

28404130402 is a wasteful number, since it uses less digits than its factorization.

28404130402 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 32121.

The product of its (nonzero) digits is 6144, while the sum is 28.

Adding to 28404130402 its reverse (20403140482), we get a palindrome (48807270884).

The spelling of 28404130402 in words is "twenty-eight billion, four hundred four million, one hundred thirty thousand, four hundred two".