398541549 has 48 divisors (see below), whose sum is σ = 671815680. Its totient is φ = 208746720.

The previous prime is 398541499. The next prime is 398541553. The reversal of 398541549 is 945145893.

398541549 = T₁₆₀ + T₁₆₁ + ... + T₁₃₃₇.

It is not a de Polignac number, because 398541549 - 2¹² = 398537453 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 398541498 and 398541507.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (398541569) by changing a digit.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 84282 + ... + 88884.

It is an arithmetic number, because the mean of its divisors is an integer number (13996160).

Almost surely, 2^398541549 is an apocalyptic number.

It is an amenable number.

398541549 is a deficient number, since it is larger than the sum of its proper divisors (273274131).

398541549 is a wasteful number, since it uses less digits than its factorization.

398541549 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4670 (or 4663 counting only the distinct ones).

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

The square root of 398541549 is about 19963.5054286566. The cubic root of 398541549 is about 735.9097125827.

The spelling of 398541549 in words is "three hundred ninety-eight million, five hundred forty-one thousand, five hundred forty-nine".