1858349 has 4 divisors (see below), whose sum is σ = 1922460. Its totient is φ = 1794240.

The previous prime is 1858343. The next prime is 1858369. The reversal of 1858349 is 9438581.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 9438581 = 523 ⋅18047.

It can be written as a sum of positive squares in 2 ways, for example, as 797449 + 1060900 = 893^2 + 1030^2 .

It is a cyclic number.

It is not a de Polignac number, because 1858349 - 2⁸ = 1858093 is a prime.

It is a super-2 number, since 2×1858349² = 6906922011602, which contains 22 as substring.

It is an alternating number because its digits alternate between odd and even.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1858343) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 32012 + ... + 32069.

It is an arithmetic number, because the mean of its divisors is an integer number (480615).

2^1858349 is an apocalyptic number.

It is an amenable number.

1858349 is a deficient number, since it is larger than the sum of its proper divisors (64111).

1858349 is an equidigital number, since it uses as much as digits as its factorization.

1858349 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 64110.

The product of its digits is 34560, while the sum is 38.

The square root of 1858349 is about 1363.2127493535. The cubic root of 1858349 is about 122.9444965170.

The spelling of 1858349 in words is "one million, eight hundred fifty-eight thousand, three hundred forty-nine".