401628826 has 4 divisors (see below), whose sum is σ = 602443242. Its totient is φ = 200814412.

The previous prime is 401628803. The next prime is 401628889. The reversal of 401628826 is 628826104.

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., 254370601 + 147258225 = 15949^2 + 12135^2 .

It is a super-2 number, since 2×401628826² = 322611427748276552, which contains 22 as substring.

It is an unprimeable number.

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, 100407205 + ... + 100407208.

Almost surely, 2^401628826 is an apocalyptic number.

401628826 is a deficient number, since it is larger than the sum of its proper divisors (200814416).

401628826 is a wasteful number, since it uses less digits than its factorization.

401628826 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 200814415.

The product of its (nonzero) digits is 36864, while the sum is 37.

The square root of 401628826 is about 20040.6792799047. The cubic root of 401628826 is about 737.8050530045.

The spelling of 401628826 in words is "four hundred one million, six hundred twenty-eight thousand, eight hundred twenty-six".