28297940677 has 8 divisors (see below), whose sum is σ = 28876738464. Its totient is φ = 27720805008.

The previous prime is 28297940651. The next prime is 28297940729. The reversal of 28297940677 is 77604979282.

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 28297940677 - 2²³ = 28289552069 is a prime.

It is a super-2 number, since 2×28297940677² (a number of 22 digits) contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (28297970677) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 381103 + ... + 449260.

It is an arithmetic number, because the mean of its divisors is an integer number (3609592308).

Almost surely, 2^28297940677 is an apocalyptic number.

It is an amenable number.

28297940677 is a deficient number, since it is larger than the sum of its proper divisors (578797787).

28297940677 is an equidigital number, since it uses as much as digits as its factorization.

28297940677 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 831059.

The product of its (nonzero) digits is 21337344, while the sum is 61.

The spelling of 28297940677 in words is "twenty-eight billion, two hundred ninety-seven million, nine hundred forty thousand, six hundred seventy-seven".