It is a congruent number.
It is an unprimeable number.
Almost surely, 23720000 is an apocalyptic number.
3720000 is a gapful number since it is divisible by the number (30) formed by its first and last digit.
It is an amenable number.
It is a practical number, because each smaller number is the sum of distinct divisors of 3720000, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (6347968).
It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.
3720000 is an equidigital number, since it uses as much as digits as its factorization.
3720000 is an evil number, because the sum of its binary digits is even.
The square root of 3720000 is about 1928.7301521986. The cubic root of 3720000 is about 154.9462178999.
Adding to 3720000 its reverse (273), we get a palindrome (3720273).
The spelling of 3720000 in words is "three million, seven hundred twenty thousand".