1383666520 has 16 divisors (see below), whose sum is σ = 3113249760. Its totient is φ = 553466592.

The previous prime is 1383666517. The next prime is 1383666547. The reversal of 1383666520 is 256663831.

It is a Harshad number since it is a multiple of its sum of digits (40), and also a Moran number because the ratio is a prime number: 34591663 = 1383666520 / (1 + 3 + 8 + 3 + 6 + 6 + 6 + 5 + 2 + 0).

It is a congruent number.

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, 17295792 + ... + 17295871.

It is an arithmetic number, because the mean of its divisors is an integer number (194578110).

Almost surely, 2^1383666520 is an apocalyptic number.

1383666520 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

1383666520 is an abundant number, since it is smaller than the sum of its proper divisors (1729583240).

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

1383666520 is a wasteful number, since it uses less digits than its factorization.

1383666520 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 34591674 (or 34591670 counting only the distinct ones).

The product of its (nonzero) digits is 155520, while the sum is 40.

The square root of 1383666520 is about 37197.6682064884. The cubic root of 1383666520 is about 1114.3214167516.

The spelling of 1383666520 in words is "one billion, three hundred eighty-three million, six hundred sixty-six thousand, five hundred twenty".