398236040 has 16 divisors (see below), whose sum is σ = 896031180. Its totient is φ = 159294400.

The previous prime is 398236039. The next prime is 398236043. The reversal of 398236040 is 40632893.

It is a happy number.

It can be written as a sum of positive squares in 2 ways, for example, as 376127236 + 22108804 = 19394^2 + 4702^2 .

It is not an unprimeable number, because it can be changed into a prime (398236043) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 4977911 + ... + 4977990.

Almost surely, 2^398236040 is an apocalyptic number.

It is an amenable number.

398236040 is an abundant number, since it is smaller than the sum of its proper divisors (497795140).

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

398236040 is a wasteful number, since it uses less digits than its factorization.

398236040 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 9955912 (or 9955908 counting only the distinct ones).

The product of its (nonzero) digits is 31104, while the sum is 35.

The square root of 398236040 is about 19955.8522744582. The cubic root of 398236040 is about 735.7216230231.

The spelling of 398236040 in words is "three hundred ninety-eight million, two hundred thirty-six thousand, forty".