7890505 has 16 divisors (see below), whose sum is σ = 10900224. Its totient is φ = 5371200.

The previous prime is 7890503. The next prime is 7890511. The reversal of 7890505 is 5050987.

It is not a de Polignac number, because 7890505 - 2¹ = 7890503 is a prime.

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

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (7890503) 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 15 ways as a sum of consecutive naturals, for example, 4539 + ... + 6031.

It is an arithmetic number, because the mean of its divisors is an integer number (681264).

Almost surely, 2^7890505 is an apocalyptic number.

It is an amenable number.

7890505 is a deficient number, since it is larger than the sum of its proper divisors (3009719).

7890505 is a wasteful number, since it uses less digits than its factorization.

7890505 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1656.

The product of its (nonzero) digits is 12600, while the sum is 34.

The square root of 7890505 is about 2809.0042719797. The cubic root of 7890505 is about 199.0833468199.

The spelling of 7890505 in words is "seven million, eight hundred ninety thousand, five hundred five".