7427420 has 144 divisors (see below), whose sum is σ = 21718368. Its totient is φ = 2096640.

The previous prime is 7427353. The next prime is 7427443. The reversal of 7427420 is 247247.

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

It is a self number, because there is not a number n which added to its sum of digits gives 7427420.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 140114 + ... + 140166.

It is an arithmetic number, because the mean of its divisors is an integer number (150822).

Almost surely, 2^7427420 is an apocalyptic number.

7427420 is a gapful number since it is divisible by the number (70) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 7427420, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (10859184).

7427420 is an abundant number, since it is smaller than the sum of its proper divisors (14290948).

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

7427420 is a wasteful number, since it uses less digits than its factorization.

7427420 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 100 (or 91 counting only the distinct ones).

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

The square root of 7427420 is about 2725.3293378966. The cubic root of 7427420 is about 195.1099095491.

The spelling of 7427420 in words is "seven million, four hundred twenty-seven thousand, four hundred twenty".