3949840225 has 12 divisors (see below), whose sum is σ = 4904994096. Its totient is φ = 3155232080.

The previous prime is 3949840187. The next prime is 3949840253. The reversal of 3949840225 is 5220489493.

It is not a de Polignac number, because 3949840225 - 2⁹ = 3949839713 is a prime.

It is a Duffinian number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 98587 + ... + 132736.

It is an arithmetic number, because the mean of its divisors is an integer number (408749508).

Almost surely, 2^3949840225 is an apocalyptic number.

It is an amenable number.

3949840225 is a deficient number, since it is larger than the sum of its proper divisors (955153871).

3949840225 is a wasteful number, since it uses less digits than its factorization.

3949840225 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 232016 (or 232011 counting only the distinct ones).

The product of its (nonzero) digits is 622080, while the sum is 46.

The square root of 3949840225 is about 62847.7543353778. The cubic root of 3949840225 is about 1580.7378150243.

The spelling of 3949840225 in words is "three billion, nine hundred forty-nine million, eight hundred forty thousand, two hundred twenty-five".