126780628 has 48 divisors (see below), whose sum is σ = 254756880. Its totient is φ = 54687744.

The previous prime is 126780587. The next prime is 126780637. The reversal of 126780628 is 826087621.

It can be written as a sum of positive squares in 8 ways, for example, as 6615184 + 120165444 = 2572^2 + 10962^2 .

It is a congruent number.

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 in 15 ways as a sum of consecutive naturals, for example, 152518 + ... + 153346.

It is an arithmetic number, because the mean of its divisors is an integer number (5307435).

Almost surely, 2^126780628 is an apocalyptic number.

It is an amenable number.

126780628 is an abundant number, since it is smaller than the sum of its proper divisors (127976252).

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

126780628 is a wasteful number, since it uses less digits than its factorization.

126780628 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1036 (or 1034 counting only the distinct ones).

The product of its (nonzero) digits is 64512, while the sum is 40.

The square root of 126780628 is about 11259.6904042696. The cubic root of 126780628 is about 502.3629856718.

The spelling of 126780628 in words is "one hundred twenty-six million, seven hundred eighty thousand, six hundred twenty-eight".