28424439650 has 24 divisors (see below), whose sum is σ = 52885445844. Its totient is φ = 11366337600.

The previous prime is 28424439649. The next prime is 28424439677. The reversal of 28424439650 is 5693442482.

It can be written as a sum of positive squares in 6 ways, for example, as 26755472041 + 1668967609 = 163571^2 + 40853^2 .

It is a junction number, because it is equal to n+sod(n) for n = 28424439595 and 28424439604.

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 84380 + ... + 252920.

Almost surely, 2^28424439650 is an apocalyptic number.

28424439650 is a deficient number, since it is larger than the sum of its proper divisors (24461006194).

28424439650 is a wasteful number, since it uses less digits than its factorization.

28424439650 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 171926 (or 171921 counting only the distinct ones).

The product of its (nonzero) digits is 1658880, while the sum is 47.

The spelling of 28424439650 in words is "twenty-eight billion, four hundred twenty-four million, four hundred thirty-nine thousand, six hundred fifty".