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7428340 = 225371417
BaseRepresentation
bin11100010101100011110100
3111222101202201
4130111203310
53400201330
6423114244
7120065653
oct34254364
914871681
107428340
114214027
1225a2984
13170118a
14db519a
159baeca
hex7158f4

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, 27428340 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".

Divisors: 1 2 4 5 10 20 371417 742834 1485668 1857085 3714170 7428340