398207388 has 24 divisors (see below), whose sum is σ = 983806992. Its totient is φ = 124927744.

The previous prime is 398207387. The next prime is 398207389. The reversal of 398207388 is 883702893.

It is an interprime number because it is at equal distance from previous prime (398207387) and next prime (398207389).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (398207387) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 975795 + ... + 976202.

It is an arithmetic number, because the mean of its divisors is an integer number (40991958).

Almost surely, 2^398207388 is an apocalyptic number.

It is an amenable number.

398207388 is an abundant number, since it is smaller than the sum of its proper divisors (585599604).

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

398207388 is a wasteful number, since it uses less digits than its factorization.

398207388 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1952021 (or 1952019 counting only the distinct ones).

The product of its (nonzero) digits is 580608, while the sum is 48.

The square root of 398207388 is about 19955.1343768966. The cubic root of 398207388 is about 735.7039782100.

The spelling of 398207388 in words is "three hundred ninety-eight million, two hundred seven thousand, three hundred eighty-eight".