3908904642 has 40 divisors (see below), whose sum is σ = 8849174796. Its totient is φ = 1289530368.

The previous prime is 3908904641. The next prime is 3908904667. The reversal of 3908904642 is 2464098093.

It can be written as a sum of positive squares in 2 ways, for example, as 3810716361 + 98188281 = 61731^2 + 9909^2 .

It is not an unprimeable number, because it can be changed into a prime (3908904641) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 19 ways as a sum of consecutive naturals, for example, 108663 + ... + 140090.

Almost surely, 2^3908904642 is an apocalyptic number.

3908904642 is an abundant number, since it is smaller than the sum of its proper divisors (4940270154).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

3908904642 is a wasteful number, since it uses less digits than its factorization.

3908904642 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 248864 (or 248855 counting only the distinct ones).

The product of its (nonzero) digits is 373248, while the sum is 45.

The square root of 3908904642 is about 62521.2335290979. The cubic root of 3908904642 is about 1575.2579931112.

The spelling of 3908904642 in words is "three billion, nine hundred eight million, nine hundred four thousand, six hundred forty-two".