12200428 has 6 divisors (see below), whose sum is σ = 21350756. Its totient is φ = 6100212.

The previous prime is 12200399. The next prime is 12200431. The reversal of 12200428 is 82400221.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1525050 + ... + 1525057.

Almost surely, 2^12200428 is an apocalyptic number.

It is an amenable number.

12200428 is a deficient number, since it is larger than the sum of its proper divisors (9150328).

12200428 is a wasteful number, since it uses less digits than its factorization.

12200428 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3050111 (or 3050109 counting only the distinct ones).

The product of its (nonzero) digits is 256, while the sum is 19.

The square root of 12200428 is about 3492.9111067990. The cubic root of 12200428 is about 230.2104438118.

Multiplying 12200428 by its sum of digits (19), we get a palindrome (231808132).

Adding to 12200428 its reverse (82400221), we get a palindrome (94600649).

The spelling of 12200428 in words is "twelve million, two hundred thousand, four hundred twenty-eight".