7403040 has 144 divisors (see below), whose sum is σ = 26004888. Its totient is φ = 1916928.

The previous prime is 7403029. The next prime is 7403047. The reversal of 7403040 is 403047.

It can be written as a sum of positive squares in 4 ways, for example, as 6411024 + 992016 = 2532^2 + 996^2 .

It is a tau number, because it is divible by the number of its divisors (144).

It is a Harshad number since it is a multiple of its sum of digits (18).

It is not an unprimeable number, because it can be changed into a prime (7403047) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 76272 + ... + 76368.

Almost surely, 2^7403040 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 7403040, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (13002444).

7403040 is an abundant number, since it is smaller than the sum of its proper divisors (18601848).

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

7403040 is a wasteful number, since it uses less digits than its factorization.

7403040 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 171 (or 160 counting only the distinct ones).

The product of its (nonzero) digits is 336, while the sum is 18.

The square root of 7403040 is about 2720.8528074852. The cubic root of 7403040 is about 194.8961972188.

Adding to 7403040 its reverse (403047), we get a palindrome (7806087).

The spelling of 7403040 in words is "seven million, four hundred three thousand, forty".