398798637 has 8 divisors (see below), whose sum is σ = 532209504. Its totient is φ = 265626768.

The previous prime is 398798611. The next prime is 398798639. The reversal of 398798637 is 736897893.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 398798637 - 2⁷ = 398798509 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (398798639) 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 7 ways as a sum of consecutive naturals, for example, 55818 + ... + 62555.

It is an arithmetic number, because the mean of its divisors is an integer number (66526188).

Almost surely, 2^398798637 is an apocalyptic number.

It is an amenable number.

398798637 is a deficient number, since it is larger than the sum of its proper divisors (133410867).

398798637 is a wasteful number, since it uses less digits than its factorization.

398798637 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 119499.

The product of its digits is 13716864, while the sum is 60.

The square root of 398798637 is about 19969.9433399296. The cubic root of 398798637 is about 736.0679168235.

It can be divided in two parts, 39879 and 8637, that added together give a triangular number (48516 = T₃₁₁).

The spelling of 398798637 in words is "three hundred ninety-eight million, seven hundred ninety-eight thousand, six hundred thirty-seven".