1018388 has 24 divisors (see below), whose sum is σ = 2093952. Its totient is φ = 424224.

The previous prime is 1018357. The next prime is 1018411. The reversal of 1018388 is 8838101.

It is a happy number.

It is a super-2 number, since 2×1018388² = 2074228237088, which contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 1018388.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 545 + ... + 1527.

It is an arithmetic number, because the mean of its divisors is an integer number (87248).

2^1018388 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 1018388, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1046976).

1018388 is an abundant number, since it is smaller than the sum of its proper divisors (1075564).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

1018388 is a wasteful number, since it uses less digits than its factorization.

1018388 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1031 (or 1029 counting only the distinct ones).

The product of its (nonzero) digits is 1536, while the sum is 29.

The square root of 1018388 is about 1009.1521193556. The cubic root of 1018388 is about 100.6092143749.

The spelling of 1018388 in words is "one million, eighteen thousand, three hundred eighty-eight".