28192745663828 has 24 divisors (see below), whose sum is σ = 50485080225888. Its totient is φ = 13768442172576.

The previous prime is 28192745663809. The next prime is 28192745663917. The reversal of 28192745663828 is 82836654729182.

It is a super-2 number, since 2×28192745663828² (a number of 28 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 in 7 ways as a sum of consecutive naturals, for example, 24100850 + ... + 25243542.

It is an arithmetic number, because the mean of its divisors is an integer number (2103545009412).

Almost surely, 2^{28192745663828} is an apocalyptic number.

It is an amenable number.

28192745663828 is a deficient number, since it is larger than the sum of its proper divisors (22292334562060).

28192745663828 is a wasteful number, since it uses less digits than its factorization.

28192745663828 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1286183 (or 1286181 counting only the distinct ones).

The product of its digits is 557383680, while the sum is 71.

The spelling of 28192745663828 in words is "twenty-eight trillion, one hundred ninety-two billion, seven hundred forty-five million, six hundred sixty-three thousand, eight hundred twenty-eight".