7420240 has 20 divisors (see below), whose sum is σ = 17252244. Its totient is φ = 2968064.

The previous prime is 7420213. The next prime is 7420243. The reversal of 7420240 is 420247.

It can be written as a sum of positive squares in 2 ways, for example, as 2650384 + 4769856 = 1628^2 + 2184^2 .

It is a tau number, because it is divible by the number of its divisors (20).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (7420243) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 46297 + ... + 46456.

Almost surely, 2^7420240 is an apocalyptic number.

It is an amenable number.

7420240 is an abundant number, since it is smaller than the sum of its proper divisors (9832004).

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

7420240 is a wasteful number, since it uses less digits than its factorization.

7420240 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 92766 (or 92760 counting only the distinct ones).

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

The square root of 7420240 is about 2724.0117474049. The cubic root of 7420240 is about 195.0470191241.

Adding to 7420240 its reverse (420247), we get a palindrome (7840487).

The spelling of 7420240 in words is "seven million, four hundred twenty thousand, two hundred forty".