1385843826 has 32 divisors (see below), whose sum is σ = 2837564928. Its totient is φ = 451094400.

The previous prime is 1385843821. The next prime is 1385843839. The reversal of 1385843826 is 6283485831.

It is a super-2 number, since 2×1385843826² = 3841126220124636552, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (1385843821) 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, 28575 + ... + 59901.

It is an arithmetic number, because the mean of its divisors is an integer number (88673904).

Almost surely, 2^1385843826 is an apocalyptic number.

1385843826 is an abundant number, since it is smaller than the sum of its proper divisors (1451721102).

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

1385843826 is a wasteful number, since it uses less digits than its factorization.

1385843826 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 31506.

The product of its digits is 1105920, while the sum is 48.

The square root of 1385843826 is about 37226.9234022904. The cubic root of 1385843826 is about 1114.9056006737.

The spelling of 1385843826 in words is "one billion, three hundred eighty-five million, eight hundred forty-three thousand, eight hundred twenty-six".