1890380 has 24 divisors (see below), whose sum is σ = 4099200. Its totient is φ = 731520.

The previous prime is 1890379. The next prime is 1890389. The reversal of 1890380 is 830981.

It is a happy number.

It is a Smith number, since the sum of its digits (29) coincides with the sum of the digits of its prime factors.

It is not an unprimeable number, because it can be changed into a prime (1890389) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 905 + ... + 2144.

It is an arithmetic number, because the mean of its divisors is an integer number (170800).

2^1890380 is an apocalyptic number.

1890380 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

1890380 is an abundant number, since it is smaller than the sum of its proper divisors (2208820).

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

1890380 is a wasteful number, since it uses less digits than its factorization.

1890380 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3089 (or 3087 counting only the distinct ones).

The product of its (nonzero) digits is 1728, while the sum is 29.

The square root of 1890380 is about 1374.9109062045. The cubic root of 1890380 is about 123.6468446211.

The spelling of 1890380 in words is "one million, eight hundred ninety thousand, three hundred eighty".