7906985 has 8 divisors (see below), whose sum is σ = 9541896. Its totient is φ = 6289920.

The previous prime is 7906981. The next prime is 7906993. The reversal of 7906985 is 5896097.

It can be written as a sum of positive squares in 4 ways, for example, as 50176 + 7856809 = 224^2 + 2803^2 .

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

It is not a de Polignac number, because 7906985 - 2² = 7906981 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (7906981) 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, 3464 + ... + 5273.

It is an arithmetic number, because the mean of its divisors is an integer number (1192737).

Almost surely, 2^7906985 is an apocalyptic number.

It is an amenable number.

7906985 is a deficient number, since it is larger than the sum of its proper divisors (1634911).

7906985 is a wasteful number, since it uses less digits than its factorization.

7906985 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 8923.

The product of its (nonzero) digits is 136080, while the sum is 44.

The square root of 7906985 is about 2811.9361657050. The cubic root of 7906985 is about 199.2218513499.

The spelling of 7906985 in words is "seven million, nine hundred six thousand, nine hundred eighty-five".