1385690020 has 96 divisors (see below), whose sum is σ = 3462520320. Its totient is φ = 459164160.

The previous prime is 1385690011. The next prime is 1385690029. The reversal of 1385690020 is 200965831.

It is an interprime number because it is at equal distance from previous prime (1385690011) and next prime (1385690029).

It is a super-3 number, since 3×1385690020³ (a number of 28 digits) contains 333 as substring.

It is not an unprimeable number, because it can be changed into a prime (1385690029) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 222874 + ... + 229006.

It is an arithmetic number, because the mean of its divisors is an integer number (36067920).

Almost surely, 2^1385690020 is an apocalyptic number.

1385690020 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 1385690020, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1731260160).

1385690020 is an abundant number, since it is smaller than the sum of its proper divisors (2076830300).

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

1385690020 is a wasteful number, since it uses less digits than its factorization.

1385690020 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6245 (or 6243 counting only the distinct ones).

The product of its (nonzero) digits is 12960, while the sum is 34.

The square root of 1385690020 is about 37224.8575551338. The cubic root of 1385690020 is about 1114.8643537184.

The spelling of 1385690020 in words is "one billion, three hundred eighty-five million, six hundred ninety thousand, twenty".