28435210549 has 4 divisors (see below), whose sum is σ = 28459167264. Its totient is φ = 28411253836.

The previous prime is 28435210547. The next prime is 28435210577. The reversal of 28435210549 is 94501253482.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4, and also an emirpimes, since its reverse is a distinct semiprime: 94501253482 = 2 ⋅47250626741.

It is a cyclic number.

It is not a de Polignac number, because 28435210549 - 2¹ = 28435210547 is a prime.

It is a super-2 number, since 2×28435210549² (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 (28435210543) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 11976577 + ... + 11978950.

It is an arithmetic number, because the mean of its divisors is an integer number (7114791816).

Almost surely, 2^28435210549 is an apocalyptic number.

It is an amenable number.

28435210549 is a deficient number, since it is larger than the sum of its proper divisors (23956715).

28435210549 is a wasteful number, since it uses less digits than its factorization.

28435210549 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 23956714.

The product of its (nonzero) digits is 345600, while the sum is 43.

The spelling of 28435210549 in words is "twenty-eight billion, four hundred thirty-five million, two hundred ten thousand, five hundred forty-nine".