1388450626 has 16 divisors (see below), whose sum is σ = 2097691200. Its totient is φ = 689229648.

The previous prime is 1388450617. The next prime is 1388450629. The reversal of 1388450626 is 6260548831.

It is not an unprimeable number, because it can be changed into a prime (1388450629) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 428380 + ... + 431608.

It is an arithmetic number, because the mean of its divisors is an integer number (131105700).

Almost surely, 2^1388450626 is an apocalyptic number.

1388450626 is a deficient number, since it is larger than the sum of its proper divisors (709240574).

1388450626 is a wasteful number, since it uses less digits than its factorization.

1388450626 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4713.

The product of its (nonzero) digits is 276480, while the sum is 43.

The square root of 1388450626 is about 37261.9192474032. The cubic root of 1388450626 is about 1115.6042160769.

The spelling of 1388450626 in words is "one billion, three hundred eighty-eight million, four hundred fifty thousand, six hundred twenty-six".