1385804357 has 4 divisors (see below), whose sum is σ = 1583776416. Its totient is φ = 1187832300.

The previous prime is 1385804339. The next prime is 1385804363. The reversal of 1385804357 is 7534085831.

It is a happy number.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 1385804357 - 2¹⁶ = 1385738821 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1385804857) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 98986019 + ... + 98986032.

It is an arithmetic number, because the mean of its divisors is an integer number (395944104).

Almost surely, 2^1385804357 is an apocalyptic number.

It is an amenable number.

1385804357 is a deficient number, since it is larger than the sum of its proper divisors (197972059).

1385804357 is an equidigital number, since it uses as much as digits as its factorization.

1385804357 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 197972058.

The product of its (nonzero) digits is 403200, while the sum is 44.

The square root of 1385804357 is about 37226.3932848725. The cubic root of 1385804357 is about 1114.8950163577.

The spelling of 1385804357 in words is "one billion, three hundred eighty-five million, eight hundred four thousand, three hundred fifty-seven".