7904440 has 32 divisors (see below), whose sum is σ = 18035280. Its totient is φ = 3117312.

The previous prime is 7904423. The next prime is 7904453. The reversal of 7904440 is 444097.

It is a junction number, because it is equal to n+sod(n) for n = 7904399 and 7904408.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1567 + ... + 4273.

Almost surely, 2^7904440 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 7904440, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (9017640).

7904440 is an abundant number, since it is smaller than the sum of its proper divisors (10130840).

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

7904440 is a wasteful number, since it uses less digits than its factorization.

7904440 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2791 (or 2787 counting only the distinct ones).

The product of its (nonzero) digits is 4032, while the sum is 28.

The square root of 7904440 is about 2811.4835941189. The cubic root of 7904440 is about 199.2004747224.

The spelling of 7904440 in words is "seven million, nine hundred four thousand, four hundred forty".