398619393357025 has 9 divisors (see below), whose sum is σ = 494288171548563. Its totient is φ = 318895434823800.

The previous prime is 398619393357013. The next prime is 398619393357067. The reversal of 398619393357025 is 520753393916893.

The square root of 398619393357025 is 19965455.

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., 143502981608529 + 255116411748496 = 11979273^2 + 15972364^2 .

It is not a de Polignac number, because 398619393357025 - 2⁵ = 398619393356993 is a prime.

It is a Duffinian number.

It is an unprimeable number.

It is a polite number, since it can be written in 8 ways as a sum of consecutive naturals, for example, 97830730 + ... + 101823820.

Almost surely, 2^{398619393357025} is an apocalyptic number.

398619393357025 is the 19965455-th square number.

398619393357025 is the 9982728-th centered octagonal number.

It is an amenable number.

398619393357025 is a deficient number, since it is larger than the sum of its proper divisors (95668778191538).

398619393357025 is an frugal number, since it uses more digits than its factorization.

398619393357025 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7986192 (or 3993096 counting only the distinct ones).

The product of its (nonzero) digits is 992023200, while the sum is 73.

The spelling of 398619393357025 in words is "three hundred ninety-eight trillion, six hundred nineteen billion, three hundred ninety-three million, three hundred fifty-seven thousand, twenty-five".