1387878876250 has 40 divisors (see below), whose sum is σ = 2616477799716. Its totient is φ = 551942496000.

The previous prime is 1387878876227. The next prime is 1387878876257. The reversal of 1387878876250 is 526788787831.

It is a happy number.

It can be written as a sum of positive squares in 10 ways, for example, as 1634018929 + 1386244857321 = 40423^2 + 1177389^2 .

It is a Smith number, since the sum of its digits (70) coincides with the sum of the digits of its prime factors.

It is a self number, because there is not a number n which added to its sum of digits gives 1387878876250.

It is not an unprimeable number, because it can be changed into a prime (1387878876257) by changing a digit.

It is a polite number, since it can be written in 19 ways as a sum of consecutive naturals, for example, 2992719 + ... + 3425218.

Almost surely, 2^{1387878876250} is an apocalyptic number.

1387878876250 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

1387878876250 is a deficient number, since it is larger than the sum of its proper divisors (1228598923466).

1387878876250 is an equidigital number, since it uses as much as digits as its factorization.

1387878876250 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6418132 (or 6418117 counting only the distinct ones).

The product of its (nonzero) digits is 252887040, while the sum is 70.

The spelling of 1387878876250 in words is "one trillion, three hundred eighty-seven billion, eight hundred seventy-eight million, eight hundred seventy-six thousand, two hundred fifty".