28746697439 has 4 divisors (see below), whose sum is σ = 28750605840. Its totient is φ = 28742789040.

The previous prime is 28746697429. The next prime is 28746697477. The reversal of 28746697439 is 93479664782.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 28746697439 - 2⁴ = 28746697423 is a prime.

It is a super-2 number, since 2×28746697439² (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 (28746697429) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1943147 + ... + 1957884.

It is an arithmetic number, because the mean of its divisors is an integer number (7187651460).

Almost surely, 2^28746697439 is an apocalyptic number.

28746697439 is a deficient number, since it is larger than the sum of its proper divisors (3908401).

28746697439 is an equidigital number, since it uses as much as digits as its factorization.

28746697439 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3908400.

The product of its digits is 109734912, while the sum is 65.

The spelling of 28746697439 in words is "twenty-eight billion, seven hundred forty-six million, six hundred ninety-seven thousand, four hundred thirty-nine".