1860138 has 96 divisors (see below), whose sum is σ = 5198400. Its totient is φ = 489888.

The previous prime is 1860127. The next prime is 1860139. The reversal of 1860138 is 8310681.

It is a super-2 number, since 2×1860138² = 6920226758088, which contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (27).

It is an Ulam number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1860139) by changing a digit.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 50256 + ... + 50292.

It is an arithmetic number, because the mean of its divisors is an integer number (54150).

2^1860138 is an apocalyptic number.

1860138 is a gapful number since it is divisible by the number (18) formed by its first and last digit.

It is a practical number, because each smaller number is the sum of distinct divisors of 1860138, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (2599200).

1860138 is an abundant number, since it is smaller than the sum of its proper divisors (3338262).

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

1860138 is a wasteful number, since it uses less digits than its factorization.

1860138 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 81 (or 68 counting only the distinct ones).

The product of its (nonzero) digits is 1152, while the sum is 27.

The square root of 1860138 is about 1363.8687620149. The cubic root of 1860138 is about 122.9839360342.

The spelling of 1860138 in words is "one million, eight hundred sixty thousand, one hundred thirty-eight".