398967638 has 8 divisors (see below), whose sum is σ = 613047960. Its totient is φ = 194618320.

The previous prime is 398967629. The next prime is 398967659. The reversal of 398967638 is 836769893.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a Curzon number.

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 3 ways as a sum of consecutive naturals, for example, 2432648 + ... + 2432811.

It is an arithmetic number, because the mean of its divisors is an integer number (76630995).

Almost surely, 2^398967638 is an apocalyptic number.

398967638 is a deficient number, since it is larger than the sum of its proper divisors (214080322).

398967638 is a wasteful number, since it uses less digits than its factorization.

398967638 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4865502.

The product of its digits is 11757312, while the sum is 59.

The square root of 398967638 is about 19974.1742757992. The cubic root of 398967638 is about 736.1718779328.

The spelling of 398967638 in words is "three hundred ninety-eight million, nine hundred sixty-seven thousand, six hundred thirty-eight".