1888398349 has 4 divisors (see below), whose sum is σ = 1896644860. Its totient is φ = 1880151840.

The previous prime is 1888398331. The next prime is 1888398367. The reversal of 1888398349 is 9438938881.

It is a semiprime because it is the product of two primes.

It is an interprime number because it is at equal distance from previous prime (1888398331) and next prime (1888398367).

It can be written as a sum of positive squares in 2 ways, for example, as 709849449 + 1178548900 = 26643^2 + 34330^2 .

It is a cyclic number.

It is not a de Polignac number, because 1888398349 - 2¹⁵ = 1888365581 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1888398319) 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, 4122912 + ... + 4123369.

It is an arithmetic number, because the mean of its divisors is an integer number (474161215).

Almost surely, 2^1888398349 is an apocalyptic number.

It is an amenable number.

1888398349 is a deficient number, since it is larger than the sum of its proper divisors (8246511).

1888398349 is an equidigital number, since it uses as much as digits as its factorization.

1888398349 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 8246510.

The product of its digits is 11943936, while the sum is 61.

The square root of 1888398349 is about 43455.7055977693. The cubic root of 1888398349 is about 1236.0362393500.

The spelling of 1888398349 in words is "one billion, eight hundred eighty-eight million, three hundred ninety-eight thousand, three hundred forty-nine".