28920275092 has 6 divisors (see below), whose sum is σ = 50610481418. Its totient is φ = 14460137544.

The previous prime is 28920275081. The next prime is 28920275107. The reversal of 28920275092 is 29057202982.

It can be written as a sum of positive squares in only one way, i.e., 19879308036 + 9040967056 = 140994^2 + 95084^2 .

It is a super-2 number, since 2×28920275092² (a number of 22 digits) contains 22 as substring.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 3615034383 + ... + 3615034390.

Almost surely, 2^28920275092 is an apocalyptic number.

It is an amenable number.

28920275092 is a deficient number, since it is larger than the sum of its proper divisors (21690206326).

28920275092 is a wasteful number, since it uses less digits than its factorization.

28920275092 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7230068777 (or 7230068775 counting only the distinct ones).

The product of its (nonzero) digits is 362880, while the sum is 46.

The spelling of 28920275092 in words is "twenty-eight billion, nine hundred twenty million, two hundred seventy-five thousand, ninety-two".