125638928 has 10 divisors (see below), whose sum is σ = 243425454. Its totient is φ = 62819456.

The previous prime is 125638921. The next prime is 125638957. The reversal of 125638928 is 829836521.

It can be written as a sum of positive squares in only one way, i.e., 80856064 + 44782864 = 8992^2 + 6692^2 .

It is not an unprimeable number, because it can be changed into a prime (125638921) by changing a digit.

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, 3926201 + ... + 3926232.

Almost surely, 2^125638928 is an apocalyptic number.

It is an amenable number.

125638928 is a deficient number, since it is larger than the sum of its proper divisors (117786526).

125638928 is an equidigital number, since it uses as much as digits as its factorization.

125638928 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7852441 (or 7852435 counting only the distinct ones).

The product of its digits is 207360, while the sum is 44.

The square root of 125638928 is about 11208.8771962226. The cubic root of 125638928 is about 500.8504566269.

The spelling of 125638928 in words is "one hundred twenty-five million, six hundred thirty-eight thousand, nine hundred twenty-eight".