Search a number
-
+
2840357 = 1341732
BaseRepresentation
bin1010110101011100100101
312100022020102
422311130211
51211342412
6140513445
733066632
oct12653445
95308212
102840357
111670003
12b4b885
13785ab0
1453d189
153b18c2
hex2b5725

2840357 has 12 divisors (see below), whose sum is σ = 3176964. Its totient is φ = 2522880.

The previous prime is 2840353. The next prime is 2840359. The reversal of 2840357 is 7530482.

It is a happy number.

It can be written as a sum of positive squares in 6 ways, for example, as 450241 + 2390116 = 671^2 + 1546^2 .

It is not a de Polignac number, because 2840357 - 22 = 2840353 is a prime.

It is a Smith number, since the sum of its digits (29) coincides with the sum of the digits of its prime factors.

It is an Ulam number.

It is a d-powerful number, because it can be written as 25 + 83 + 46 + 0 + 310 + 59 + 77 .

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2840353) 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, 38873 + ... + 38945.

It is an arithmetic number, because the mean of its divisors is an integer number (264747).

22840357 is an apocalyptic number.

It is an amenable number.

2840357 is a deficient number, since it is larger than the sum of its proper divisors (336607).

2840357 is an equidigital number, since it uses as much as digits as its factorization.

2840357 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 200 (or 127 counting only the distinct ones).

The product of its (nonzero) digits is 6720, while the sum is 29.

The square root of 2840357 is about 1685.3358715698. The cubic root of 2840357 is about 141.6199085981.

The spelling of 2840357 in words is "two million, eight hundred forty thousand, three hundred fifty-seven".

Divisors: 1 13 41 73 533 949 2993 5329 38909 69277 218489 2840357