1386502920 has 160 divisors (see below), whose sum is σ = 5083974720. Its totient is φ = 336113280.

The previous prime is 1386502913. The next prime is 1386502933. The reversal of 1386502920 is 292056831.

It is a Harshad number since it is a multiple of its sum of digits (36).

It is an unprimeable number.

It is a polite number, since it can be written in 39 ways as a sum of consecutive naturals, for example, 16189 + ... + 55091.

It is an arithmetic number, because the mean of its divisors is an integer number (31774842).

Almost surely, 2^1386502920 is an apocalyptic number.

1386502920 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 1386502920, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (2541987360).

1386502920 is an abundant number, since it is smaller than the sum of its proper divisors (3697471800).

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

1386502920 is a wasteful number, since it uses less digits than its factorization.

1386502920 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 38937 (or 38924 counting only the distinct ones).

The product of its (nonzero) digits is 25920, while the sum is 36.

The square root of 1386502920 is about 37235.7747334469. The cubic root of 1386502920 is about 1115.0823187898.

The spelling of 1386502920 in words is "one billion, three hundred eighty-six million, five hundred two thousand, nine hundred twenty".