3923720 has 32 divisors (see below), whose sum is σ = 8887320. Its totient is φ = 1559040.

The previous prime is 3923687. The next prime is 3923723. The reversal of 3923720 is 273293.

It can be written as a sum of positive squares in 4 ways, for example, as 1214404 + 2709316 = 1102^2 + 1646^2 .

It is a Smith number, since the sum of its digits (26) coincides with the sum of the digits of its prime factors.

It is a self number, because there is not a number n which added to its sum of digits gives 3923720.

It is not an unprimeable number, because it can be changed into a prime (3923723) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 9110 + ... + 9530.

Almost surely, 2^3923720 is an apocalyptic number.

It is an amenable number.

3923720 is an abundant number, since it is smaller than the sum of its proper divisors (4963600).

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

3923720 is a wasteful number, since it uses less digits than its factorization.

3923720 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 665 (or 661 counting only the distinct ones).

The product of its (nonzero) digits is 2268, while the sum is 26.

The square root of 3923720 is about 1980.8382064167. The cubic root of 3923720 is about 157.7245641849.

The spelling of 3923720 in words is "three million, nine hundred twenty-three thousand, seven hundred twenty".