28428680349 has 8 divisors (see below), whose sum is σ = 42116563520. Its totient is φ = 18952453548.

The previous prime is 28428680341. The next prime is 28428680351. The reversal of 28428680349 is 94308682482.

28428680349 is a `hidden beast` number, since 284 + 286 + 80 + 3 + 4 + 9 = 666.

It is not a de Polignac number, because 28428680349 - 2³ = 28428680341 is a prime.

It is a super-3 number, since 3×28428680349³ (a number of 32 digits) contains 333 as substring.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 28428680295 and 28428680304.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (28428680341) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 526457017 + ... + 526457070.

It is an arithmetic number, because the mean of its divisors is an integer number (5264570440).

Almost surely, 2^28428680349 is an apocalyptic number.

It is an amenable number.

28428680349 is a deficient number, since it is larger than the sum of its proper divisors (13687883171).

28428680349 is a wasteful number, since it uses less digits than its factorization.

28428680349 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1052914096 (or 1052914090 counting only the distinct ones).

The product of its (nonzero) digits is 5308416, while the sum is 54.

The spelling of 28428680349 in words is "twenty-eight billion, four hundred twenty-eight million, six hundred eighty thousand, three hundred forty-nine".