1385343831 has 8 divisors (see below), whose sum is σ = 1847489904. Its totient is φ = 923380160.

The previous prime is 1385343823. The next prime is 1385343853. The reversal of 1385343831 is 1383435831.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 1385343831 - 2³ = 1385343823 is a prime.

It is a super-2 number, since 2×1385343831² = 3838355060179513122, which contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 1385343831.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1385343871) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 26766 + ... + 59051.

It is an arithmetic number, because the mean of its divisors is an integer number (230936238).

Almost surely, 2^1385343831 is an apocalyptic number.

1385343831 is a deficient number, since it is larger than the sum of its proper divisors (462146073).

1385343831 is an equidigital number, since it uses as much as digits as its factorization.

1385343831 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 91201.

The product of its digits is 103680, while the sum is 39.

The square root of 1385343831 is about 37220.2072938881. The cubic root of 1385343831 is about 1114.7715032454.

The spelling of 1385343831 in words is "one billion, three hundred eighty-five million, three hundred forty-three thousand, eight hundred thirty-one".