3898915438 has 16 divisors (see below), whose sum is σ = 6381497520. Its totient is φ = 1771830400.

The previous prime is 3898915429. The next prime is 3898915451. The reversal of 3898915438 is 8345198983.

It is a congruent number.

It is an unprimeable number.

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 7 ways as a sum of consecutive naturals, for example, 92508 + ... + 127888.

It is an arithmetic number, because the mean of its divisors is an integer number (398843595).

Almost surely, 2^3898915438 is an apocalyptic number.

3898915438 is a deficient number, since it is larger than the sum of its proper divisors (2482582082).

3898915438 is a wasteful number, since it uses less digits than its factorization.

3898915438 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 40403.

The product of its digits is 7464960, while the sum is 58.

The square root of 3898915438 is about 62441.2959346617. The cubic root of 3898915438 is about 1573.9149914237.

The spelling of 3898915438 in words is "three billion, eight hundred ninety-eight million, nine hundred fifteen thousand, four hundred thirty-eight".