1383312520 has 16 divisors (see below), whose sum is σ = 3112453260. Its totient is φ = 553324992.

The previous prime is 1383312509. The next prime is 1383312563. The reversal of 1383312520 is 252133831.

It can be written as a sum of positive squares in 2 ways, for example, as 1375371396 + 7941124 = 37086^2 + 2818^2 .

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 17291367 + ... + 17291446.

Almost surely, 2^1383312520 is an apocalyptic number.

1383312520 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

1383312520 is an abundant number, since it is smaller than the sum of its proper divisors (1729140740).

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

1383312520 is a wasteful number, since it uses less digits than its factorization.

1383312520 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 34582824 (or 34582820 counting only the distinct ones).

The product of its (nonzero) digits is 4320, while the sum is 28.

The square root of 1383312520 is about 37192.9095393195. The cubic root of 1383312520 is about 1114.2263785755.

Subtracting from 1383312520 its reverse (252133831), we obtain a square (1131178689 = 33633²).

The spelling of 1383312520 in words is "one billion, three hundred eighty-three million, three hundred twelve thousand, five hundred twenty".