28504501261 has 8 divisors (see below), whose sum is σ = 28739721024. Its totient is φ = 28269675360.

The previous prime is 28504501247. The next prime is 28504501301. The reversal of 28504501261 is 16210540582.

It is a happy number.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 28504501261 - 2⁷ = 28504501133 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (28504507261) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 47766 + ... + 243496.

It is an arithmetic number, because the mean of its divisors is an integer number (3592465128).

Almost surely, 2^28504501261 is an apocalyptic number.

It is an amenable number.

28504501261 is a deficient number, since it is larger than the sum of its proper divisors (235219763).

28504501261 is a wasteful number, since it uses less digits than its factorization.

28504501261 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 196931.

The product of its (nonzero) digits is 19200, while the sum is 34.

The spelling of 28504501261 in words is "twenty-eight billion, five hundred four million, five hundred one thousand, two hundred sixty-one".