398886396 has 12 divisors (see below), whose sum is σ = 930734952. Its totient is φ = 132962128.

The previous prime is 398886353. The next prime is 398886403. The reversal of 398886396 is 693688893.

It is a tau number, because it is divible by the number of its divisors (12).

It is a super-2 number, since 2×398886396² = 318220713827737632, which contains 22 as substring.

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, 16620255 + ... + 16620278.

It is an arithmetic number, because the mean of its divisors is an integer number (77561246).

Almost surely, 2^398886396 is an apocalyptic number.

It is an amenable number.

398886396 is an abundant number, since it is smaller than the sum of its proper divisors (531848556).

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

398886396 is a wasteful number, since it uses less digits than its factorization.

398886396 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 33240540 (or 33240538 counting only the distinct ones).

The product of its digits is 13436928, while the sum is 60.

The square root of 398886396 is about 19972.1404962012. The cubic root of 398886396 is about 736.1219055123.

The spelling of 398886396 in words is "three hundred ninety-eight million, eight hundred eighty-six thousand, three hundred ninety-six".