28390949459 has 4 divisors (see below), whose sum is σ = 28394373840. Its totient is φ = 28387525080.

The previous prime is 28390949437. The next prime is 28390949527. The reversal of 28390949459 is 95494909382.

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 28390949459 - 2²⁰ = 28389900883 is a prime.

It is a super-2 number, since 2×28390949459² (a number of 22 digits) contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (28390949159) 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 3 ways as a sum of consecutive naturals, for example, 1699724 + ... + 1716345.

It is an arithmetic number, because the mean of its divisors is an integer number (7098593460).

Almost surely, 2^28390949459 is an apocalyptic number.

28390949459 is a deficient number, since it is larger than the sum of its proper divisors (3424381).

28390949459 is an equidigital number, since it uses as much as digits as its factorization.

28390949459 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3424380.

The product of its (nonzero) digits is 25194240, while the sum is 62.

The spelling of 28390949459 in words is "twenty-eight billion, three hundred ninety million, nine hundred forty-nine thousand, four hundred fifty-nine".