1388676630 has 64 divisors (see below), whose sum is σ = 3656275200. Its totient is φ = 334753920.

The previous prime is 1388676623. The next prime is 1388676631. The reversal of 1388676630 is 366768831.

It is a Smith number, since the sum of its digits (48) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is a self number, because there is not a number n which added to its sum of digits gives 1388676630.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1388676631) 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 in 31 ways as a sum of consecutive naturals, for example, 47316 + ... + 70824.

It is an arithmetic number, because the mean of its divisors is an integer number (57129300).

Almost surely, 2^1388676630 is an apocalyptic number.

1388676630 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is a practical number, because each smaller number is the sum of distinct divisors of 1388676630, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1828137600).

1388676630 is an abundant number, since it is smaller than the sum of its proper divisors (2267598570).

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

1388676630 is a wasteful number, since it uses less digits than its factorization.

1388676630 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 23709.

The product of its (nonzero) digits is 870912, while the sum is 48.

The square root of 1388676630 is about 37264.9517643590. The cubic root of 1388676630 is about 1115.6647433370.

It can be divided in two parts, 138 and 8676630, that added together give a palindrome (8676768).

The spelling of 1388676630 in words is "one billion, three hundred eighty-eight million, six hundred seventy-six thousand, six hundred thirty".