1840397 has 8 divisors (see below), whose sum is σ = 2086560. Its totient is φ = 1609200.

The previous prime is 1840393. The next prime is 1840429. The reversal of 1840397 is 7930481.

1840397 is nontrivially palindromic in base 4.

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 1840397 - 2² = 1840393 is a prime.

It is a super-2 number, since 2×1840397² = 6774122235218, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1840393) 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, 3479 + ... + 3972.

It is an arithmetic number, because the mean of its divisors is an integer number (260820).

2^1840397 is an apocalyptic number.

It is an amenable number.

1840397 is a deficient number, since it is larger than the sum of its proper divisors (246163).

1840397 is a wasteful number, since it uses less digits than its factorization.

1840397 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7483.

The product of its (nonzero) digits is 6048, while the sum is 32.

The square root of 1840397 is about 1356.6123248740. The cubic root of 1840397 is about 122.5473258762.

The spelling of 1840397 in words is "one million, eight hundred forty thousand, three hundred ninety-seven".