3940720 has 80 divisors (see below), whose sum is σ = 10856448. Its totient is φ = 1301760.

The previous prime is 3940697. The next prime is 3940721. The reversal of 3940720 is 270493.

3940720 = T₇₉ + T₈₀ + ... + T₂₈₈.

It is a tau number, because it is divible by the number of its divisors (80).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (3940721) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 17247 + ... + 17473.

Almost surely, 2^3940720 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 3940720, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (5428224).

3940720 is an abundant number, since it is smaller than the sum of its proper divisors (6915728).

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

3940720 is a wasteful number, since it uses less digits than its factorization.

3940720 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 278 (or 272 counting only the distinct ones).

The product of its (nonzero) digits is 1512, while the sum is 25.

The square root of 3940720 is about 1985.1246812228. The cubic root of 3940720 is about 157.9520230340.

It can be divided in two parts, 39407 and 20, that multiplied together give a triangular number (788140 = T₁₂₅₅).

The spelling of 3940720 in words is "three million, nine hundred forty thousand, seven hundred twenty".