1381204890 has 144 divisors (see below), whose sum is σ = 3946475520. Its totient is φ = 334938240.

The previous prime is 1381204889. The next prime is 1381204897. The reversal of 1381204890 is 984021831.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1381204897) by changing a digit.

It is a polite number, since it can be written in 71 ways as a sum of consecutive naturals, for example, 1079271 + ... + 1080549.

It is an arithmetic number, because the mean of its divisors is an integer number (27406080).

Almost surely, 2^1381204890 is an apocalyptic number.

1381204890 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is a practical number, because each smaller number is the sum of distinct divisors of 1381204890, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1973237760).

1381204890 is an abundant number, since it is smaller than the sum of its proper divisors (2565270630).

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

1381204890 is a wasteful number, since it uses less digits than its factorization.

1381204890 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1389 (or 1373 counting only the distinct ones).

The product of its (nonzero) digits is 13824, while the sum is 36.

The square root of 1381204890 is about 37164.5649779464. The cubic root of 1381204890 is about 1113.6602084610.

The spelling of 1381204890 in words is "one billion, three hundred eighty-one million, two hundred four thousand, eight hundred ninety".