3280639 has 2 divisors, whose sum is σ = 3280640. Its totient is φ = 3280638.

The previous prime is 3280621. The next prime is 3280649. The reversal of 3280639 is 9360823.

It is a happy number.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 3280639 - 2⁹ = 3280127 is a prime.

It is a d-powerful number, because it can be written as 3 + 2⁷ + 8 + 0 + 6⁸ + 3¹³ + 9⁴ .

It is a self number, because there is not a number n which added to its sum of digits gives 3280639.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (3280649) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1640319 + 1640320.

It is an arithmetic number, because the mean of its divisors is an integer number (1640320).

Almost surely, 2^3280639 is an apocalyptic number.

3280639 is a deficient number, since it is larger than the sum of its proper divisors (1).

3280639 is an equidigital number, since it uses as much as digits as its factorization.

3280639 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 7776, while the sum is 31.

The square root of 3280639 is about 1811.2534333991. The cubic root of 3280639 is about 148.5888247892.

The spelling of 3280639 in words is "three million, two hundred eighty thousand, six hundred thirty-nine".