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2780307 = 32308923
BaseRepresentation
bin1010100110110010010011
312020020212100
422212302103
51202432212
6135331443
732426565
oct12466223
95206770
102780307
111629982
12b20b83
1376466a
14525335
1539dbdc
hex2a6c93

2780307 has 6 divisors (see below), whose sum is σ = 4016012. Its totient is φ = 1853532.

The previous prime is 2780303. The next prime is 2780329. The reversal of 2780307 is 7030872.

2780307 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is not a de Polignac number, because 2780307 - 22 = 2780303 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (2780303) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 154453 + ... + 154470.

22780307 is an apocalyptic number.

2780307 is a deficient number, since it is larger than the sum of its proper divisors (1235705).

2780307 is a wasteful number, since it uses less digits than its factorization.

2780307 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 308929 (or 308926 counting only the distinct ones).

The product of its (nonzero) digits is 2352, while the sum is 27.

The square root of 2780307 is about 1667.4252606939. The cubic root of 2780307 is about 140.6147625140.

The spelling of 2780307 in words is "two million, seven hundred eighty thousand, three hundred seven".

Divisors: 1 3 9 308923 926769 2780307