39720000 has 140 divisors (see below), whose sum is σ = 131720336. Its totient is φ = 10560000.

The previous prime is 39719971. The next prime is 39720001. The reversal of 39720000 is 2793.

It is not an unprimeable number, because it can be changed into a prime (39720001) by changing a digit.

It is a polite number, since it can be written in 19 ways as a sum of consecutive naturals, for example, 119835 + ... + 120165.

Almost surely, 2^39720000 is an apocalyptic number.

39720000 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 39720000, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (65860168).

39720000 is an abundant number, since it is smaller than the sum of its proper divisors (92000336).

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

39720000 is an equidigital number, since it uses as much as digits as its factorization.

39720000 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 366 (or 341 counting only the distinct ones).

The product of its (nonzero) digits is 378, while the sum is 21.

The square root of 39720000 is about 6302.3805026355. The cubic root of 39720000 is about 341.1953313114.

Adding to 39720000 its reverse (2793), we get a palindrome (39722793).

It can be divided in two parts, 3 and 9720000, that multiplied together give a square (29160000 = 5400²).

The spelling of 39720000 in words is "thirty-nine million, seven hundred twenty thousand".