28195223200 has 36 divisors (see below), whose sum is σ = 68831590590. Its totient is φ = 11278088960.

The previous prime is 28195223171. The next prime is 28195223207. The reversal of 28195223200 is 232259182.

It can be written as a sum of positive squares in 3 ways, for example, as 24053528464 + 4141694736 = 155092^2 + 64356^2 .

It is a super-2 number, since 2×28195223200² (a number of 22 digits) contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (28195223207) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 17621215 + ... + 17622814.

Almost surely, 2^28195223200 is an apocalyptic number.

28195223200 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

28195223200 is an abundant number, since it is smaller than the sum of its proper divisors (40636367390).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

28195223200 is a wasteful number, since it uses less digits than its factorization.

28195223200 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 35244049 (or 35244036 counting only the distinct ones).

The product of its (nonzero) digits is 17280, while the sum is 34.

The spelling of 28195223200 in words is "twenty-eight billion, one hundred ninety-five million, two hundred twenty-three thousand, two hundred".