28731247309097 has 16 divisors (see below), whose sum is σ = 29213110670400. Its totient is φ = 28253337995520.

The previous prime is 28731247309081. The next prime is 28731247309111. The reversal of 28731247309097 is 79090374213782.

It is a cyclic number.

It is not a de Polignac number, because 28731247309097 - 2⁴ = 28731247309081 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (28731247308097) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 10856438 + ... + 13241024.

It is an arithmetic number, because the mean of its divisors is an integer number (1825819416900).

Almost surely, 2^{28731247309097} is an apocalyptic number.

It is an amenable number.

28731247309097 is a deficient number, since it is larger than the sum of its proper divisors (481863361303).

28731247309097 is a wasteful number, since it uses less digits than its factorization.

28731247309097 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2385416.

The product of its (nonzero) digits is 32006016, while the sum is 62.

The spelling of 28731247309097 in words is "twenty-eight trillion, seven hundred thirty-one billion, two hundred forty-seven million, three hundred nine thousand, ninety-seven".