1385168240 has 20 divisors (see below), whose sum is σ = 3220516344. Its totient is φ = 554067264.

The previous prime is 1385168227. The next prime is 1385168273. The reversal of 1385168240 is 428615831.

It is a tau number, because it is divible by the number of its divisors (20).

It is a Smith number, since the sum of its digits (38) coincides with the sum of the digits of its prime factors.

It is a junction number, because it is equal to n+sod(n) for n = 1385168194 and 1385168203.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 8657222 + ... + 8657381.

Almost surely, 2^1385168240 is an apocalyptic number.

1385168240 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

1385168240 is an abundant number, since it is smaller than the sum of its proper divisors (1835348104).

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

1385168240 is a wasteful number, since it uses less digits than its factorization.

1385168240 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 17314616 (or 17314610 counting only the distinct ones).

The product of its (nonzero) digits is 46080, while the sum is 38.

The square root of 1385168240 is about 37217.8484063762. The cubic root of 1385168240 is about 1114.7244025163.

The spelling of 1385168240 in words is "one billion, three hundred eighty-five million, one hundred sixty-eight thousand, two hundred forty".