398476707 has 4 divisors (see below), whose sum is σ = 531302280. Its totient is φ = 265651136.

The previous prime is 398476703. The next prime is 398476709. The reversal of 398476707 is 707674893.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 398476707 - 2² = 398476703 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 398476707.

It is not an unprimeable number, because it can be changed into a prime (398476703) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 66412782 + ... + 66412787.

It is an arithmetic number, because the mean of its divisors is an integer number (132825570).

Almost surely, 2^398476707 is an apocalyptic number.

398476707 is a deficient number, since it is larger than the sum of its proper divisors (132825573).

398476707 is a wasteful number, since it uses less digits than its factorization.

398476707 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 132825572.

The product of its (nonzero) digits is 1778112, while the sum is 51.

The square root of 398476707 is about 19961.8813492116. The cubic root of 398476707 is about 735.8698000183.

The spelling of 398476707 in words is "three hundred ninety-eight million, four hundred seventy-six thousand, seven hundred seven".