28920647892423 has 48 divisors (see below), whose sum is σ = 46168981186560. Its totient is φ = 16049403115200.

The previous prime is 28920647892401. The next prime is 28920647892457. The reversal of 28920647892423 is 32429874602982.

It is not a de Polignac number, because 28920647892423 - 2⁹ = 28920647891911 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (28920647492423) by changing a digit.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 19704463 + ... + 21121248.

It is an arithmetic number, because the mean of its divisors is an integer number (961853774720).

Almost surely, 2^{28920647892423} is an apocalyptic number.

28920647892423 is a deficient number, since it is larger than the sum of its proper divisors (17248333294137).

28920647892423 is a wasteful number, since it uses less digits than its factorization.

28920647892423 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 40825868 (or 40825861 counting only the distinct ones).

The product of its (nonzero) digits is 167215104, while the sum is 66.

The spelling of 28920647892423 in words is "twenty-eight trillion, nine hundred twenty billion, six hundred forty-seven million, eight hundred ninety-two thousand, four hundred twenty-three".