398873529 has 6 divisors (see below), whose sum is σ = 576150666. Its totient is φ = 265915680.

The previous prime is 398873491. The next prime is 398873539. The reversal of 398873529 is 925378893.

It is a happy number.

398873529 is a `hidden beast` number, since 39 + 8 + 87 + 3 + 529 = 666.

It can be written as a sum of positive squares in only one way, i.e., 390141504 + 8732025 = 19752^2 + 2955^2 .

It is not a de Polignac number, because 398873529 - 2⁸ = 398873273 is a prime.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (398873539) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 22159632 + ... + 22159649.

It is an arithmetic number, because the mean of its divisors is an integer number (96025111).

Almost surely, 2^398873529 is an apocalyptic number.

It is an amenable number.

398873529 is a deficient number, since it is larger than the sum of its proper divisors (177277137).

398873529 is a wasteful number, since it uses less digits than its factorization.

398873529 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 44319287 (or 44319284 counting only the distinct ones).

The product of its digits is 3265920, while the sum is 54.

The square root of 398873529 is about 19971.8183698931. The cubic root of 398873529 is about 736.1139903244.

The spelling of 398873529 in words is "three hundred ninety-eight million, eight hundred seventy-three thousand, five hundred twenty-nine".