28304772436 has 12 divisors (see below), whose sum is σ = 49790002612. Its totient is φ = 14079057408.

The previous prime is 28304772427. The next prime is 28304772437. The reversal of 28304772436 is 63427740382.

It can be written as a sum of positive squares in 2 ways, for example, as 15056762436 + 13248010000 = 122706^2 + 115100^2 .

It is a hoax number, since the sum of its digits (46) coincides with the sum of the digits of its distinct prime factors.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (28304772437) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 18331335 + ... + 18332878.

Almost surely, 2^28304772436 is an apocalyptic number.

It is an amenable number.

28304772436 is a deficient number, since it is larger than the sum of its proper divisors (21485230176).

28304772436 is a wasteful number, since it uses less digits than its factorization.

28304772436 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 36664410 (or 36664408 counting only the distinct ones).

The product of its (nonzero) digits is 1354752, while the sum is 46.

The spelling of 28304772436 in words is "twenty-eight billion, three hundred four million, seven hundred seventy-two thousand, four hundred thirty-six".