1385338220 has 48 divisors (see below), whose sum is σ = 3357764928. Its totient is φ = 470265600.

The previous prime is 1385338169. The next prime is 1385338223. The reversal of 1385338220 is 228335831.

It is a Harshad number since it is a multiple of its sum of digits (35).

It is not an unprimeable number, because it can be changed into a prime (1385338223) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 34847 + ... + 63126.

It is an arithmetic number, because the mean of its divisors is an integer number (69953436).

Almost surely, 2^1385338220 is an apocalyptic number.

1385338220 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

1385338220 is an abundant number, since it is smaller than the sum of its proper divisors (1972426708).

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

1385338220 is a wasteful number, since it uses less digits than its factorization.

1385338220 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 98090 (or 98088 counting only the distinct ones).

The product of its (nonzero) digits is 34560, while the sum is 35.

The square root of 1385338220 is about 37220.1319180897. The cubic root of 1385338220 is about 1114.7699982060.

The spelling of 1385338220 in words is "one billion, three hundred eighty-five million, three hundred thirty-eight thousand, two hundred twenty".