3907720 has 32 divisors (see below), whose sum is σ = 8853120. Its totient is φ = 1552320.

The previous prime is 3907699. The next prime is 3907727. The reversal of 3907720 is 277093.

It is a happy number.

It is a Smith number, since the sum of its digits (28) coincides with the sum of the digits of its prime factors.

It is not an unprimeable number, because it can be changed into a prime (3907727) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 8209 + ... + 8671.

It is an arithmetic number, because the mean of its divisors is an integer number (276660).

Almost surely, 2^3907720 is an apocalyptic number.

It is an amenable number.

3907720 is an abundant number, since it is smaller than the sum of its proper divisors (4945400).

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

3907720 is a wasteful number, since it uses less digits than its factorization.

3907720 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 685 (or 681 counting only the distinct ones).

The product of its (nonzero) digits is 2646, while the sum is 28.

The square root of 3907720 is about 1976.7953864778. The cubic root of 3907720 is about 157.5098843213.

The spelling of 3907720 in words is "three million, nine hundred seven thousand, seven hundred twenty".