398232937249 has 27 divisors (see below), whose sum is σ = 492196350387. Its totient is φ = 321202964544.

The previous prime is 398232937247. The next prime is 398232937253. The reversal of 398232937249 is 942739232893.

The square root of 398232937249 is 631057.

It is a perfect power (a square), and thus also a powerful number.

It can be written as a sum of positive squares in only one way, i.e., 310042944225 + 88189993024 = 556815^2 + 296968^2 .

It is not a de Polignac number, because 398232937249 - 2¹ = 398232937247 is a prime.

It is not an unprimeable number, because it can be changed into a prime (398232937247) by changing a digit.

It is a polite number, since it can be written in 26 ways as a sum of consecutive naturals, for example, 75093132 + ... + 75098434.

Almost surely, 2^398232937249 is an apocalyptic number.

398232937249 is the 631057-th square number.

398232937249 is the 315529-th centered octagonal number.

It is an amenable number.

398232937249 is a deficient number, since it is larger than the sum of its proper divisors (93963413138).

398232937249 is an frugal number, since it uses more digits than its factorization.

398232937249 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 10654 (or 5327 counting only the distinct ones).

The product of its digits is 35271936, while the sum is 61.

The spelling of 398232937249 in words is "three hundred ninety-eight billion, two hundred thirty-two million, nine hundred thirty-seven thousand, two hundred forty-nine".