7428340 has 12 divisors (see below), whose sum is σ = 15599556. Its totient is φ = 2971328.

The previous prime is 7428307. The next prime is 7428341. The reversal of 7428340 is 438247.

It can be written as a sum of positive squares in 2 ways, for example, as 3825936 + 3602404 = 1956^2 + 1898^2 .

It is a junction number, because it is equal to n+sod(n) for n = 7428299 and 7428308.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (7428341) 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, 185689 + ... + 185728.

It is an arithmetic number, because the mean of its divisors is an integer number (1299963).

Almost surely, 2^7428340 is an apocalyptic number.

It is an amenable number.

7428340 is an abundant number, since it is smaller than the sum of its proper divisors (8171216).

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

7428340 is a wasteful number, since it uses less digits than its factorization.

7428340 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 371426 (or 371424 counting only the distinct ones).

The product of its (nonzero) digits is 5376, while the sum is 28.

The square root of 7428340 is about 2725.4981196104. The cubic root of 7428340 is about 195.1179650024.

The spelling of 7428340 in words is "seven million, four hundred twenty-eight thousand, three hundred forty".