398837945 has 8 divisors (see below), whose sum is σ = 522115200. Its totient is φ = 290063920.

The previous prime is 398837941. The next prime is 398837993. The reversal of 398837945 is 549738893.

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

It is not a de Polignac number, because 398837945 - 2² = 398837941 is a prime.

It is not an unprimeable number, because it can be changed into a prime (398837941) 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, 3625745 + ... + 3625854.

It is an arithmetic number, because the mean of its divisors is an integer number (65264400).

Almost surely, 2^398837945 is an apocalyptic number.

It is an amenable number.

398837945 is a deficient number, since it is larger than the sum of its proper divisors (123277255).

398837945 is a wasteful number, since it uses less digits than its factorization.

398837945 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7251615.

The product of its digits is 6531840, while the sum is 56.

The square root of 398837945 is about 19970.9274947359. The cubic root of 398837945 is about 736.0920997941.

The spelling of 398837945 in words is "three hundred ninety-eight million, eight hundred thirty-seven thousand, nine hundred forty-five".