1869040 has 40 divisors (see below), whose sum is σ = 4428288. Its totient is φ = 733440.

The previous prime is 1869029. The next prime is 1869041. The reversal of 1869040 is 409681.

1869040 = 226² + 227² + ... + 257².

It is a tau number, because it is divible by the number of its divisors (40).

It is a hoax number, since the sum of its digits (28) coincides with the sum of the digits of its distinct prime factors.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1869041) 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, 4689 + ... + 5071.

2^1869040 is an apocalyptic number.

1869040 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 1869040, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (2214144).

1869040 is an abundant number, since it is smaller than the sum of its proper divisors (2559248).

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

1869040 is a wasteful number, since it uses less digits than its factorization.

1869040 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 457 (or 451 counting only the distinct ones).

The product of its (nonzero) digits is 1728, while the sum is 28.

The square root of 1869040 is about 1367.1283772931. The cubic root of 1869040 is about 123.1798106007.

The spelling of 1869040 in words is "one million, eight hundred sixty-nine thousand, forty".