2018388490 has 12 divisors (see below), whose sum is σ = 3633355026. Its totient is φ = 807298568.

The previous prime is 2018388469. The next prime is 2018388511. The reversal of 2018388490 is 948838102.

2018388490 is digitally balanced in base 6, because in such base it contains all the possibile digits an equal number of times.

It is an interprime number because it is at equal distance from previous prime (2018388469) and next prime (2018388511).

It can be written as a sum of positive squares in only one way, i.e., 1816549641 + 201838849 = 42621^2 + 14207^2 .

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 134967 + ... + 149173.

Almost surely, 2^2018388490 is an apocalyptic number.

2018388490 is a deficient number, since it is larger than the sum of its proper divisors (1614966536).

2018388490 is an frugal number, since it uses more digits than its factorization.

2018388490 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 28421 (or 14214 counting only the distinct ones).

The product of its (nonzero) digits is 110592, while the sum is 43.

The square root of 2018388490 is about 44926.4787180122. The cubic root of 2018388490 is about 1263.7706168737.

The spelling of 2018388490 in words is "two billion, eighteen million, three hundred eighty-eight thousand, four hundred ninety".