7640285 has 8 divisors (see below), whose sum is σ = 9192120. Its totient is φ = 6096384.

The previous prime is 7640279. The next prime is 7640287. The reversal of 7640285 is 5820467.

It can be written as a sum of positive squares in 4 ways, for example, as 143641 + 7496644 = 379^2 + 2738^2 .

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 7640285 - 2⁶ = 7640221 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (7640287) by changing a digit.

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, 401 + ... + 3929.

It is an arithmetic number, because the mean of its divisors is an integer number (1149015).

Almost surely, 2^7640285 is an apocalyptic number.

It is an amenable number.

7640285 is a deficient number, since it is larger than the sum of its proper divisors (1551835).

7640285 is a wasteful number, since it uses less digits than its factorization.

7640285 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3967.

The product of its (nonzero) digits is 13440, while the sum is 32.

The square root of 7640285 is about 2764.1065464269. The cubic root of 7640285 is about 196.9562890987.

The spelling of 7640285 in words is "seven million, six hundred forty thousand, two hundred eighty-five".