3686400 has 135 divisors (see below), whose sum is σ = 13205101. Its totient is φ = 983040.

The previous prime is 3686387. The next prime is 3686401. The reversal of 3686400 is 46863.

3686400 = T₅₀₉ + T₅₁₀ + ... + T₅₃₅.

The square root of 3686400 is 1920.

It is a perfect power (a square), and thus also a powerful number.

It is a Jordan-Polya number, since it can be written as (5!)² ⋅ (2!)⁸.

It can be written as a sum of positive squares in only one way, i.e., 1327104 + 2359296 = 1152^2 + 1536^2 .

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (3686401) by changing a digit.

It is a polite number, since it can be written in 8 ways as a sum of consecutive naturals, for example, 737278 + ... + 737282.

Almost surely, 2^3686400 is an apocalyptic number.

3686400 is a gapful number since it is divisible by the number (30) formed by its first and last digit.

3686400 is the 1920-th square number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 3686400

3686400 is an abundant number, since it is smaller than the sum of its proper divisors (9518701).

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

3686400 is an equidigital number, since it uses as much as digits as its factorization.

3686400 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 44 (or 10 counting only the distinct ones).

The product of its (nonzero) digits is 3456, while the sum is 27.

The cubic root of 3686400 is about 154.4783015369.

It can be divided in two parts, 36 and 86400, that added together give a square (86436 = 294²).

The spelling of 3686400 in words is "three million, six hundred eighty-six thousand, four hundred".