398022237 has 36 divisors (see below), whose sum is σ = 604070272. Its totient is φ = 252277200.

The previous prime is 398022227. The next prime is 398022239. The reversal of 398022237 is 732220893.

It is not a de Polignac number, because 398022237 - 2⁷ = 398022109 is a prime.

It is a super-2 number, since 2×398022237² = 316843402292968338, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (398022239) by changing a digit.

It is a polite number, since it can be written in 35 ways as a sum of consecutive naturals, for example, 1406298 + ... + 1406580.

Almost surely, 2^398022237 is an apocalyptic number.

It is an amenable number.

398022237 is a deficient number, since it is larger than the sum of its proper divisors (206048035).

398022237 is a wasteful number, since it uses less digits than its factorization.

398022237 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 462 (or 388 counting only the distinct ones).

The product of its (nonzero) digits is 36288, while the sum is 36.

The square root of 398022237 is about 19950.4946555217. The cubic root of 398022237 is about 735.5899359223.

The spelling of 398022237 in words is "three hundred ninety-eight million, twenty-two thousand, two hundred thirty-seven".