398636372 has 18 divisors (see below), whose sum is σ = 716987502. Its totient is φ = 193928544.

The previous prime is 398636351. The next prime is 398636389. The reversal of 398636372 is 273636893.

It can be written as a sum of positive squares in 3 ways, for example, as 243235216 + 155401156 = 15596^2 + 12466^2 .

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 30923 + ... + 41874.

It is an arithmetic number, because the mean of its divisors is an integer number (39832639).

Almost surely, 2^398636372 is an apocalyptic number.

It is an amenable number.

398636372 is a deficient number, since it is larger than the sum of its proper divisors (318351130).

398636372 is a wasteful number, since it uses less digits than its factorization.

398636372 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 72875 (or 72836 counting only the distinct ones).

The product of its digits is 979776, while the sum is 47.

The square root of 398636372 is about 19965.8801959743. The cubic root of 398636372 is about 735.9680717285.

The spelling of 398636372 in words is "three hundred ninety-eight million, six hundred thirty-six thousand, three hundred seventy-two".