401775898 has 4 divisors (see below), whose sum is σ = 602663850. Its totient is φ = 200887948.

The previous prime is 401775893. The next prime is 401775901. The reversal of 401775898 is 898577104.

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

It can be written as a sum of positive squares in only one way, i.e., 390971529 + 10804369 = 19773^2 + 3287^2 .

It is a super-2 number, since 2×401775898² = 322847744427412808, which contains 22 as substring.

It is a Smith number, since the sum of its digits (49) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is not an unprimeable number, because it can be changed into a prime (401775893) 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 as a sum of consecutive naturals, namely, 100443973 + ... + 100443976.

Almost surely, 2^401775898 is an apocalyptic number.

401775898 is a deficient number, since it is larger than the sum of its proper divisors (200887952).

401775898 is a wasteful number, since it uses less digits than its factorization.

401775898 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 200887951.

The product of its (nonzero) digits is 564480, while the sum is 49.

The square root of 401775898 is about 20044.3482807499. The cubic root of 401775898 is about 737.8951006765.

The spelling of 401775898 in words is "four hundred one million, seven hundred seventy-five thousand, eight hundred ninety-eight".