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307078345 = 5721253381
BaseRepresentation
bin10010010011011…
…010010011001001
3210101211012022001
4102103122103021
51112103001340
650245431001
710416060100
oct2223322311
9711735261
10307078345
11148379562
1286a0b461
134b808882
142cad7037
151be5b29a
hex124da4c9

307078345 has 12 divisors (see below), whose sum is σ = 428656644. Its totient is φ = 210567840.

The previous prime is 307078333. The next prime is 307078363. The reversal of 307078345 is 543870703.

It can be written as a sum of positive squares in 2 ways, for example, as 93450889 + 213627456 = 9667^2 + 14616^2 .

It is not a de Polignac number, because 307078345 - 29 = 307077833 is a prime.

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

It is a Duffinian number.

It is a congruent number.

It is an unprimeable number.

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 11 ways as a sum of consecutive naturals, for example, 626446 + ... + 626935.

It is an arithmetic number, because the mean of its divisors is an integer number (35721387).

Almost surely, 2307078345 is an apocalyptic number.

307078345 is a gapful number since it is divisible by the number (35) formed by its first and last digit.

It is an amenable number.

307078345 is a deficient number, since it is larger than the sum of its proper divisors (121578299).

307078345 is a wasteful number, since it uses less digits than its factorization.

307078345 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1253400 (or 1253393 counting only the distinct ones).

The product of its (nonzero) digits is 70560, while the sum is 37.

The square root of 307078345 is about 17523.6510179814. The cubic root of 307078345 is about 674.6570512097.

The spelling of 307078345 in words is "three hundred seven million, seventy-eight thousand, three hundred forty-five".

Divisors: 1 5 7 35 49 245 1253381 6266905 8773667 43868335 61415669 307078345