126212728 has 8 divisors (see below), whose sum is σ = 236648880. Its totient is φ = 63106360.

The previous prime is 126212717. The next prime is 126212759. The reversal of 126212728 is 827212621.

It is a happy number.

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

It is a self number, because there is not a number n which added to its sum of digits gives 126212728.

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, 7888288 + ... + 7888303.

It is an arithmetic number, because the mean of its divisors is an integer number (29581110).

Almost surely, 2^126212728 is an apocalyptic number.

It is an amenable number.

126212728 is a deficient number, since it is larger than the sum of its proper divisors (110436152).

126212728 is a wasteful number, since it uses less digits than its factorization.

126212728 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 15776597 (or 15776593 counting only the distinct ones).

The product of its digits is 5376, while the sum is 31.

The square root of 126212728 is about 11234.4438224596. The cubic root of 126212728 is about 501.6117694822.

The spelling of 126212728 in words is "one hundred twenty-six million, two hundred twelve thousand, seven hundred twenty-eight".