398732393 has 8 divisors (see below), whose sum is σ = 418625088. Its totient is φ = 379052784.

The previous prime is 398732357. The next prime is 398732407. The reversal of 398732393 is 393237893.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 398732393 - 2²⁴ = 381955177 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (398732293) 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, 49430 + ... + 56927.

It is an arithmetic number, because the mean of its divisors is an integer number (52328136).

Almost surely, 2^398732393 is an apocalyptic number.

It is an amenable number.

398732393 is a deficient number, since it is larger than the sum of its proper divisors (19892695).

398732393 is a wasteful number, since it uses less digits than its factorization.

398732393 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 106543.

The product of its digits is 734832, while the sum is 47.

The square root of 398732393 is about 19968.2846784595. The cubic root of 398732393 is about 736.0271587578.

The spelling of 398732393 in words is "three hundred ninety-eight million, seven hundred thirty-two thousand, three hundred ninety-three".