7434640 has 40 divisors (see below), whose sum is σ = 17409600. Its totient is φ = 2952576.

The previous prime is 7434613. The next prime is 7434641. The reversal of 7434640 is 464347.

It is a tau number, because it is divible by the number of its divisors (40).

It is a junction number, because it is equal to n+sod(n) for n = 7434599 and 7434608.

It is not an unprimeable number, because it can be changed into a prime (7434641) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 15687 + ... + 16153.

It is an arithmetic number, because the mean of its divisors is an integer number (435240).

Almost surely, 2^7434640 is an apocalyptic number.

It is an amenable number.

7434640 is an abundant number, since it is smaller than the sum of its proper divisors (9974960).

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

7434640 is a wasteful number, since it uses less digits than its factorization.

7434640 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 679 (or 673 counting only the distinct ones).

The product of its (nonzero) digits is 8064, while the sum is 28.

The square root of 7434640 is about 2726.6536267007. The cubic root of 7434640 is about 195.1731094822.

Adding to 7434640 its reverse (464347), we get a palindrome (7898987).

The spelling of 7434640 in words is "seven million, four hundred thirty-four thousand, six hundred forty".