3918157328 has 20 divisors (see below), whose sum is σ = 7796604780. Its totient is φ = 1906130304.

The previous prime is 3918157247. The next prime is 3918157339. The reversal of 3918157328 is 8237518193.

It can be written as a sum of positive squares in 2 ways, for example, as 1672155664 + 2246001664 = 40892^2 + 47392^2 .

It is a hoax number, since the sum of its digits (47) coincides with the sum of the digits of its distinct prime factors.

It is an unprimeable number.

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 3 ways as a sum of consecutive naturals, for example, 3308663 + ... + 3309846.

It is an arithmetic number, because the mean of its divisors is an integer number (389830239).

Almost surely, 2^3918157328 is an apocalyptic number.

It is an amenable number.

3918157328 is a deficient number, since it is larger than the sum of its proper divisors (3878447452).

3918157328 is a wasteful number, since it uses less digits than its factorization.

3918157328 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6618554 (or 6618548 counting only the distinct ones).

The product of its digits is 362880, while the sum is 47.

The square root of 3918157328 is about 62595.1861407888. The cubic root of 3918157328 is about 1576.4999337284.

The spelling of 3918157328 in words is "three billion, nine hundred eighteen million, one hundred fifty-seven thousand, three hundred twenty-eight".