398661047 has 8 divisors (see below), whose sum is σ = 422815200. Its totient is φ = 375075360.

The previous prime is 398661037. The next prime is 398661049. The reversal of 398661047 is 740166893.

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

It is a cyclic number.

It is not a de Polignac number, because 398661047 - 2¹⁴ = 398644663 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 398660989 and 398661007.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (398661049) 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, 140672 + ... + 143477.

It is an arithmetic number, because the mean of its divisors is an integer number (52851900).

Almost surely, 2^398661047 is an apocalyptic number.

398661047 is a deficient number, since it is larger than the sum of its proper divisors (24154153).

398661047 is a wasteful number, since it uses less digits than its factorization.

398661047 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 284233.

The product of its (nonzero) digits is 217728, while the sum is 44.

The square root of 398661047 is about 19966.4981155935. The cubic root of 398661047 is about 735.9832565258.

It can be divided in two parts, 3986 and 61047, that multiplied together give a palindrome (243333342).

The spelling of 398661047 in words is "three hundred ninety-eight million, six hundred sixty-one thousand, forty-seven".