28390847261 has 8 divisors (see below), whose sum is σ = 34154402880. Its totient is φ = 23054221728.

The previous prime is 28390847201. The next prime is 28390847279. The reversal of 28390847261 is 16274809382.

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

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-28390847261 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (28390847201) 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, 106732376 + ... + 106732641.

It is an arithmetic number, because the mean of its divisors is an integer number (4269300360).

Almost surely, 2^28390847261 is an apocalyptic number.

It is an amenable number.

28390847261 is a deficient number, since it is larger than the sum of its proper divisors (5763555619).

28390847261 is a wasteful number, since it uses less digits than its factorization.

28390847261 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 213465043.

The product of its (nonzero) digits is 1161216, while the sum is 50.

The spelling of 28390847261 in words is "twenty-eight billion, three hundred ninety million, eight hundred forty-seven thousand, two hundred sixty-one".