7422140 has 36 divisors (see below), whose sum is σ = 17137848. Its totient is φ = 2698080.

The previous prime is 7422131. The next prime is 7422143. The reversal of 7422140 is 412247.

It is a Harshad number since it is a multiple of its sum of digits (20).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (7422143) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 887 + ... + 3953.

Almost surely, 2^7422140 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 7422140, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (8568924).

7422140 is an abundant number, since it is smaller than the sum of its proper divisors (9715708).

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

7422140 is a wasteful number, since it uses less digits than its factorization.

7422140 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3098 (or 3085 counting only the distinct ones).

The product of its (nonzero) digits is 448, while the sum is 20.

The square root of 7422140 is about 2724.3604754144. The cubic root of 7422140 is about 195.0636653831.

Adding to 7422140 its reverse (412247), we get a palindrome (7834387).

It can be divided in two parts, 742 and 2140, that added together give a palindrome (2882).

The spelling of 7422140 in words is "seven million, four hundred twenty-two thousand, one hundred forty".