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BaseRepresentation
bin1101001011111100010101
320111121211020
431023330111
51341104124
6202031353
741245050
oct15137425
96447736
103456789
111a51156
1211a8559
1394054b
1465da97
15484379
hex34bf15

3456789 has 16 divisors (see below), whose sum is σ = 5324928. Its totient is φ = 1953792.

The previous prime is 3456781. The next prime is 3456793. The reversal of 3456789 is 9876543.

3456789 = T217 + T218 + ... + T313.

It is a happy number.

3456789 is an esthetic number in base 10, because in such base its adjacent digits differ by 1.

It is not a de Polignac number, because 3456789 - 23 = 3456781 is a prime.

It is an alternating number because its digits alternate between odd and even.

It is a straight-line number, since its digits are in arithmetic progression.

It is a plaindrome in base 10.

It is a self number, because there is not a number n which added to its sum of digits gives 3456789.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (3456781) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 1189 + ... + 2885.

It is an arithmetic number, because the mean of its divisors is an integer number (332808).

Almost surely, 23456789 is an apocalyptic number.

It is an amenable number.

3456789 is a deficient number, since it is larger than the sum of its proper divisors (1868139).

3456789 is a wasteful number, since it uses less digits than its factorization.

3456789 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1804.

The product of its digits is 181440, while the sum is 42.

The square root of 3456789 is about 1859.2442012818. The cubic root of 3456789 is about 151.2020306410.

The spelling of 3456789 in words is "three million, four hundred fifty-six thousand, seven hundred eighty-nine".