398683551 has 12 divisors (see below), whose sum is σ = 618366552. Its totient is φ = 227819088.

The previous prime is 398683513. The next prime is 398683559. The reversal of 398683551 is 155386893.

It is not a de Polignac number, because 398683551 - 2¹⁴ = 398667167 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 398683551.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (398683559) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 1355920 + ... + 1356213.

It is an arithmetic number, because the mean of its divisors is an integer number (51530546).

Almost surely, 2^398683551 is an apocalyptic number.

398683551 is a deficient number, since it is larger than the sum of its proper divisors (219683001).

398683551 is a wasteful number, since it uses less digits than its factorization.

398683551 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2712150 (or 2712143 counting only the distinct ones).

The product of its digits is 777600, while the sum is 48.

The square root of 398683551 is about 19967.0616516302. The cubic root of 398683551 is about 735.9971047608.

The spelling of 398683551 in words is "three hundred ninety-eight million, six hundred eighty-three thousand, five hundred fifty-one".