3078505 has 8 divisors (see below), whose sum is σ = 3764232. Its totient is φ = 2416128.

The previous prime is 3078503. The next prime is 3078521. The reversal of 3078505 is 5058703.

It can be written as a sum of positive squares in 4 ways, for example, as 375769 + 2702736 = 613^2 + 1644^2 .

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

It is a 3-Lehmer number, since φ(3078505) divides (3078505-1)³.

It is a cyclic number.

It is not a de Polignac number, because 3078505 - 2¹ = 3078503 is a prime.

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

It is a Duffinian number.

3078505 is a lucky number.

It is not an unprimeable number, because it can be changed into a prime (3078503) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 5544 + ... + 6073.

It is an arithmetic number, because the mean of its divisors is an integer number (470529).

Almost surely, 2^3078505 is an apocalyptic number.

It is an amenable number.

3078505 is a deficient number, since it is larger than the sum of its proper divisors (685727).

3078505 is a wasteful number, since it uses less digits than its factorization.

3078505 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 11675.

The product of its (nonzero) digits is 4200, while the sum is 28.

The square root of 3078505 is about 1754.5668981261. The cubic root of 3078505 is about 145.4721824613.

The spelling of 3078505 in words is "three million, seventy-eight thousand, five hundred five".