1385126550 has 36 divisors (see below), whose sum is σ = 3721374540. Its totient is φ = 369366960.

The previous prime is 1385126549. The next prime is 1385126569. The reversal of 1385126550 is 556215831.

It is a happy number.

1385126550 is a `hidden beast` number, since 1 + 3 + 85 + 1 + 26 + 550 = 666.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 17 ways as a sum of consecutive naturals, for example, 1538580 + ... + 1539479.

It is an arithmetic number, because the mean of its divisors is an integer number (103371515).

Almost surely, 2^1385126550 is an apocalyptic number.

1385126550 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

1385126550 is an abundant number, since it is smaller than the sum of its proper divisors (2336247990).

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

1385126550 is a wasteful number, since it uses less digits than its factorization.

1385126550 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3078077 (or 3078069 counting only the distinct ones).

The product of its (nonzero) digits is 36000, while the sum is 36.

The square root of 1385126550 is about 37217.2883214240. The cubic root of 1385126550 is about 1114.7132189586.

It can be divided in two parts, 13851 and 26550, that added together give a square (40401 = 201²).

The spelling of 1385126550 in words is "one billion, three hundred eighty-five million, one hundred twenty-six thousand, five hundred fifty".