3942720 has 126 divisors (see below), whose sum is σ = 13937742. Its totient is φ = 1022976.

The previous prime is 3942677. The next prime is 3942721. The reversal of 3942720 is 272493.

3942720 is a `hidden beast` number, since 394 + 272 + 0 = 666.

It can be written as a sum of positive squares in 3 ways, for example, as 1937664 + 2005056 = 1392^2 + 1416^2 .

It is a zygodrome in base 4.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (3942721) by changing a digit.

It is a polite number, since it can be written in 17 ways as a sum of consecutive naturals, for example, 106542 + ... + 106578.

It is an arithmetic number, because the mean of its divisors is an integer number (110617).

Almost surely, 2^3942720 is an apocalyptic number.

3942720 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 3942720, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (6968871).

3942720 is an abundant number, since it is smaller than the sum of its proper divisors (9995022).

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

3942720 is a wasteful number, since it uses less digits than its factorization.

3942720 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 97 (or 47 counting only the distinct ones).

The product of its (nonzero) digits is 3024, while the sum is 27.

The square root of 3942720 is about 1985.6283640198. The cubic root of 3942720 is about 157.9787398623.

The spelling of 3942720 in words is "three million, nine hundred forty-two thousand, seven hundred twenty".