1381900 has 36 divisors (see below), whose sum is σ = 3232432. Its totient is φ = 509760.

The previous prime is 1381883. The next prime is 1381901. The reversal of 1381900 is 91831.

It is a super-2 number, since 2×1381900² = 3819295220000, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (1381901) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 769 + ... + 1831.

2^1381900 is an apocalyptic number.

1381900 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 1381900, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1616216).

1381900 is an abundant number, since it is smaller than the sum of its proper divisors (1850532).

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

1381900 is a wasteful number, since it uses less digits than its factorization.

1381900 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1090 (or 1083 counting only the distinct ones).

The product of its (nonzero) digits is 216, while the sum is 22.

The square root of 1381900 is about 1175.5424279880. The cubic root of 1381900 is about 111.3846998639.

The spelling of 1381900 in words is "one million, three hundred eighty-one thousand, nine hundred".