398046991186 has 16 divisors (see below), whose sum is σ = 643012536600. Its totient is φ = 183710124288.

The previous prime is 398046991087. The next prime is 398046991201. The reversal of 398046991186 is 681199640893.

It can be written as a sum of positive squares in 4 ways, for example, as 266364371025 + 131682620161 = 516105^2 + 362881^2 .

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1370620 + ... + 1635448.

Almost surely, 2^398046991186 is an apocalyptic number.

398046991186 is a deficient number, since it is larger than the sum of its proper divisors (244965545414).

398046991186 is a wasteful number, since it uses less digits than its factorization.

398046991186 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 322653.

The product of its (nonzero) digits is 20155392, while the sum is 64.

The spelling of 398046991186 in words is "three hundred ninety-eight billion, forty-six million, nine hundred ninety-one thousand, one hundred eighty-six".