3991142402 has 16 divisors (see below), whose sum is σ = 6451622520. Its totient is φ = 1840810752.

The previous prime is 3991142401. The next prime is 3991142431. The reversal of 3991142402 is 2042411993.

It can be written as a sum of positive squares in 4 ways, for example, as 2187526441 + 1803615961 = 46771^2 + 42469^2 .

It is not an unprimeable number, because it can be changed into a prime (3991142401) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 12833 + ... + 90260.

Almost surely, 2^3991142402 is an apocalyptic number.

3991142402 is a deficient number, since it is larger than the sum of its proper divisors (2460480118).

3991142402 is a wasteful number, since it uses less digits than its factorization.

3991142402 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 104597.

The product of its (nonzero) digits is 15552, while the sum is 35.

The square root of 3991142402 is about 63175.4889336046. The cubic root of 3991142402 is about 1586.2284726569.

The spelling of 3991142402 in words is "three billion, nine hundred ninety-one million, one hundred forty-two thousand, four hundred two".