7404040 has 64 divisors (see below), whose sum is σ = 19676160. Its totient is φ = 2453760.

The previous prime is 7404037. The next prime is 7404073. The reversal of 7404040 is 404047.

It is a happy number.

It is a junction number, because it is equal to n+sod(n) for n = 7403999 and 7404017.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 8254 + ... + 9106.

It is an arithmetic number, because the mean of its divisors is an integer number (307440).

Almost surely, 2^7404040 is an apocalyptic number.

7404040 is a gapful number since it is divisible by the number (70) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 7404040, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (9838080).

7404040 is an abundant number, since it is smaller than the sum of its proper divisors (12272120).

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

7404040 is a wasteful number, since it uses less digits than its factorization.

7404040 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 902 (or 898 counting only the distinct ones).

The product of its (nonzero) digits is 448, while the sum is 19.

The square root of 7404040 is about 2721.0365671927. The cubic root of 7404040 is about 194.9049723266.

Adding to 7404040 its reverse (404047), we get a palindrome (7808087).

The spelling of 7404040 in words is "seven million, four hundred four thousand, forty".