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378606709 = 1370941077
BaseRepresentation
bin10110100100010…
…001010001110101
3222101102012202201
4112210101101311
51233410403314
6101322504501
712245050435
oct2644212165
9871365681
10378606709
11184793908
12a6965131
1360590c50
14383d62c5
1523389b74
hex16911475

378606709 has 8 divisors (see below), whose sum is σ = 408315320. Its totient is φ = 348981696.

The previous prime is 378606691. The next prime is 378606713. The reversal of 378606709 is 907606873.

It can be written as a sum of positive squares in 4 ways, for example, as 24226084 + 354380625 = 4922^2 + 18825^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 378606709 - 27 = 378606581 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (378006709) by changing a digit.

It is a Zeisel number, with parameters (58, -45).

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 7 ways as a sum of consecutive naturals, for example, 11322 + ... + 29755.

It is an arithmetic number, because the mean of its divisors is an integer number (51039415).

Almost surely, 2378606709 is an apocalyptic number.

It is an amenable number.

378606709 is a deficient number, since it is larger than the sum of its proper divisors (29708611).

378606709 is a wasteful number, since it uses less digits than its factorization.

378606709 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 41799.

The product of its (nonzero) digits is 381024, while the sum is 46.

The square root of 378606709 is about 19457.8187112533. The cubic root of 378606709 is about 723.4293124189.

The spelling of 378606709 in words is "three hundred seventy-eight million, six hundred six thousand, seven hundred nine".

Divisors: 1 13 709 9217 41077 534001 29123593 378606709