1840369 has 8 divisors (see below), whose sum is σ = 2016360. Its totient is φ = 1671936.

The previous prime is 1840351. The next prime is 1840393. The reversal of 1840369 is 9630481.

It can be written as a sum of positive squares in 4 ways, for example, as 547600 + 1292769 = 740^2 + 1137^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 1840369 - 2⁵ = 1840337 is a prime.

It is a super-2 number, since 2×1840369² = 6773916112322, which contains 22 as substring.

It is a Duffinian number.

1840369 is a lucky number.

It is a self number, because there is not a number n which added to its sum of digits gives 1840369.

It is not an unprimeable number, because it can be changed into a prime (1840469) 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, 1374 + ... + 2359.

It is an arithmetic number, because the mean of its divisors is an integer number (252045).

2^1840369 is an apocalyptic number.

It is an amenable number.

1840369 is a deficient number, since it is larger than the sum of its proper divisors (175991).

1840369 is a wasteful number, since it uses less digits than its factorization.

1840369 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3779.

The product of its (nonzero) digits is 5184, while the sum is 31.

The square root of 1840369 is about 1356.6020050110. The cubic root of 1840369 is about 122.5467043903.

It can be divided in two parts, 1840 and 369, that added together give a square (2209 = 47²).

The spelling of 1840369 in words is "one million, eight hundred forty thousand, three hundred sixty-nine".