7422740 has 24 divisors (see below), whose sum is σ = 16787400. Its totient is φ = 2740608.

The previous prime is 7422719. The next prime is 7422743. The reversal of 7422740 is 472247.

It can be written as a sum of positive squares in 4 ways, for example, as 13456 + 7409284 = 116^2 + 2722^2 .

It is a Harshad number since it is a multiple of its sum of digits (26).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (7422743) 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, 14015 + ... + 14534.

It is an arithmetic number, because the mean of its divisors is an integer number (699475).

Almost surely, 2^7422740 is an apocalyptic number.

It is an amenable number.

7422740 is an abundant number, since it is smaller than the sum of its proper divisors (9364660).

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

7422740 is a wasteful number, since it uses less digits than its factorization.

7422740 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 28571 (or 28569 counting only the distinct ones).

The product of its (nonzero) digits is 3136, while the sum is 26.

The square root of 7422740 is about 2724.4705907754. The cubic root of 7422740 is about 195.0689215062.

Adding to 7422740 its reverse (472247), we get a palindrome (7894987).

The spelling of 7422740 in words is "seven million, four hundred twenty-two thousand, seven hundred forty".