3926440 has 64 divisors (see below), whose sum is σ = 10396800. Its totient is φ = 1306368.

The previous prime is 3926431. The next prime is 3926441. The reversal of 3926440 is 446293.

It is a Harshad number since it is a multiple of its sum of digits (28).

It is a junction number, because it is equal to n+sod(n) for n = 3926399 and 3926408.

It is not an unprimeable number, because it can be changed into a prime (3926441) 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 15 ways as a sum of consecutive naturals, for example, 10171 + ... + 10549.

It is an arithmetic number, because the mean of its divisors is an integer number (162450).

Almost surely, 2^3926440 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 3926440, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (5198400).

3926440 is an abundant number, since it is smaller than the sum of its proper divisors (6470360).

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

3926440 is a wasteful number, since it uses less digits than its factorization.

3926440 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 434 (or 430 counting only the distinct ones).

The product of its (nonzero) digits is 5184, while the sum is 28.

The square root of 3926440 is about 1981.5246655038. The cubic root of 3926440 is about 157.7610016915.

It can be divided in two parts, 39264 and 40, that added together give a cube (39304 = 34³).

The spelling of 3926440 in words is "three million, nine hundred twenty-six thousand, four hundred forty".