398948365 has 8 divisors (see below), whose sum is σ = 478873080. Its totient is φ = 319068672.

The previous prime is 398948311. The next prime is 398948371. The reversal of 398948365 is 563849893.

It can be written as a sum of positive squares in 4 ways, for example, as 7739524 + 391208841 = 2782^2 + 19779^2 .

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 398948365 - 2⁷ = 398948237 is a prime.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 12997 + ... + 31093.

It is an arithmetic number, because the mean of its divisors is an integer number (59859135).

Almost surely, 2^398948365 is an apocalyptic number.

It is an amenable number.

398948365 is a deficient number, since it is larger than the sum of its proper divisors (79924715).

398948365 is a wasteful number, since it uses less digits than its factorization.

398948365 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 22511.

The product of its digits is 5598720, while the sum is 55.

The square root of 398948365 is about 19973.6918219943. The cubic root of 398948365 is about 736.1600236137.

The spelling of 398948365 in words is "three hundred ninety-eight million, nine hundred forty-eight thousand, three hundred sixty-five".