1385396404 has 18 divisors (see below), whose sum is σ = 2820271650. Its totient is φ = 593741232.

The previous prime is 1385396401. The next prime is 1385396413. The reversal of 1385396404 is 4046935831.

It can be written as a sum of positive squares in only one way, i.e., 1088868004 + 296528400 = 32998^2 + 17220^2 .

It is a super-2 number, since 2×1385396404² = 3838646392432262432, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1385396401) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 3533979 + ... + 3534370.

Almost surely, 2^1385396404 is an apocalyptic number.

1385396404 is a gapful number since it is divisible by the number (14) formed by its first and last digit.

It is an amenable number.

1385396404 is an abundant number, since it is smaller than the sum of its proper divisors (1434875246).

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

1385396404 is a wasteful number, since it uses less digits than its factorization.

1385396404 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7068367 (or 7068358 counting only the distinct ones).

The product of its (nonzero) digits is 311040, while the sum is 43.

The square root of 1385396404 is about 37220.9135298961. The cubic root of 1385396404 is about 1114.7856047124.

The spelling of 1385396404 in words is "one billion, three hundred eighty-five million, three hundred ninety-six thousand, four hundred four".