28389855496 has 8 divisors (see below), whose sum is σ = 53230979070. Its totient is φ = 14194927744.

The previous prime is 28389855479. The next prime is 28389855497. The reversal of 28389855496 is 69455898382.

It is a happy number.

It can be written as a sum of positive squares in only one way, i.e., 28118594596 + 271260900 = 167686^2 + 16470^2 .

It is a tau number, because it is divible by the number of its divisors (8).

It is a super-3 number, since 3×28389855496³ (a number of 32 digits) contains 333 as substring. Note that it is a super-d number also for d = 2.

It is not an unprimeable number, because it can be changed into a prime (28389855497) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1774365961 + ... + 1774365976.

Almost surely, 2^28389855496 is an apocalyptic number.

It is an amenable number.

28389855496 is a deficient number, since it is larger than the sum of its proper divisors (24841123574).

28389855496 is a wasteful number, since it uses less digits than its factorization.

28389855496 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3548731943 (or 3548731939 counting only the distinct ones).

The product of its digits is 149299200, while the sum is 67.

The spelling of 28389855496 in words is "twenty-eight billion, three hundred eighty-nine million, eight hundred fifty-five thousand, four hundred ninety-six".