1385323550 has 24 divisors (see below), whose sum is σ = 2774910936. Its totient is φ = 511503840.

The previous prime is 1385323519. The next prime is 1385323571. The reversal of 1385323550 is 553235831.

It is a self number, because there is not a number n which added to its sum of digits gives 1385323550.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 1064984 + ... + 1066283.

It is an arithmetic number, because the mean of its divisors is an integer number (115621289).

Almost surely, 2^1385323550 is an apocalyptic number.

1385323550 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

1385323550 is an abundant number, since it is smaller than the sum of its proper divisors (1389587386).

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

1385323550 is a wasteful number, since it uses less digits than its factorization.

1385323550 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2131292 (or 2131287 counting only the distinct ones).

The product of its (nonzero) digits is 54000, while the sum is 35.

The square root of 1385323550 is about 37219.9348467995. The cubic root of 1385323550 is about 1114.7660632503.

The spelling of 1385323550 in words is "one billion, three hundred eighty-five million, three hundred twenty-three thousand, five hundred fifty".