1868436 has 72 divisors (see below), whose sum is σ = 5189184. Its totient is φ = 564480.

The previous prime is 1868423. The next prime is 1868443. The reversal of 1868436 is 6348681.

1868436 = T₁₉₃ + T₁₉₄ + ... + T₂₆₃.

It is a happy number.

It is a Harshad number since it is a multiple of its sum of digits (36).

It is a self number, because there is not a number n which added to its sum of digits gives 1868436.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 26281 + ... + 26351.

It is an arithmetic number, because the mean of its divisors is an integer number (72072).

2^1868436 is an apocalyptic number.

1868436 is the 731-st nonagonal number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 1868436, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (2594592).

1868436 is an abundant number, since it is smaller than the sum of its proper divisors (3320748).

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

1868436 is a wasteful number, since it uses less digits than its factorization.

1868436 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 141 (or 136 counting only the distinct ones).

The product of its digits is 27648, while the sum is 36.

The square root of 1868436 is about 1366.9074584623. The cubic root of 1868436 is about 123.1665402192.

It can be divided in two parts, 1868 and 436, that added together give a square (2304 = 48²).

The spelling of 1868436 in words is "one million, eight hundred sixty-eight thousand, four hundred thirty-six".