1385756244 has 18 divisors (see below), whose sum is σ = 3502883930. Its totient is φ = 461918736.

The previous prime is 1385756237. The next prime is 1385756263. The reversal of 1385756244 is 4426575831.

1385756244 is a `hidden beast` number, since 1 + 3 + 85 + 7 + 562 + 4 + 4 = 666.

It can be written as a sum of positive squares in only one way, i.e., 1128153744 + 257602500 = 33588^2 + 16050^2 .

It is a tau number, because it is divible by the number of its divisors (18).

It is a hoax number, since the sum of its digits (45) coincides with the sum of the digits of its distinct prime factors.

It is a self number, because there is not a number n which added to its sum of digits gives 1385756244.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 19246579 + ... + 19246650.

Almost surely, 2^1385756244 is an apocalyptic number.

It is an amenable number.

1385756244 is an abundant number, since it is smaller than the sum of its proper divisors (2117127686).

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

1385756244 is a wasteful number, since it uses less digits than its factorization.

1385756244 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 38493239 (or 38493234 counting only the distinct ones).

The product of its digits is 806400, while the sum is 45.

The square root of 1385756244 is about 37225.7470576482. The cubic root of 1385756244 is about 1114.8821137272.

The spelling of 1385756244 in words is "one billion, three hundred eighty-five million, seven hundred fifty-six thousand, two hundred forty-four".