1836720 has 60 divisors (see below), whose sum is σ = 6170736. Its totient is φ = 489600.

The previous prime is 1836691. The next prime is 1836727. The reversal of 1836720 is 276381.

It is a tau number, because it is divible by the number of its divisors (60).

It is an Ulam number.

It is not an unprimeable number, because it can be changed into a prime (1836727) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 556 + ... + 1995.

2^1836720 is an apocalyptic number.

1836720 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

1836720 is an abundant number, since it is smaller than the sum of its proper divisors (4334016).

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

1836720 is a wasteful number, since it uses less digits than its factorization.

1836720 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2570 (or 2561 counting only the distinct ones).

The product of its (nonzero) digits is 2016, while the sum is 27.

The square root of 1836720 is about 1355.2564332996. The cubic root of 1836720 is about 122.4656574562.

Adding to 1836720 its product of nonzero digits (2016), we get a square (1838736 = 1356²).

It can be divided in two parts, 1836 and 720, that added together give a triangular number (2556 = T₇₁).

The spelling of 1836720 in words is "one million, eight hundred thirty-six thousand, seven hundred twenty".