401771408 has 20 divisors (see below), whose sum is σ = 803543808. Its totient is φ = 194405280.

The previous prime is 401771401. The next prime is 401771443. The reversal of 401771408 is 804177104.

401771408 is an admirable number.

It is a super-2 number, since 2×401771408² = 322840528572604928, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (401771401) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 404516 + ... + 405507.

Almost surely, 2^401771408 is an apocalyptic number.

It is an amenable number.

401771408 is a primitive abundant number, since it is smaller than the sum of its proper divisors, none of which is abundant.

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

401771408 is a wasteful number, since it uses less digits than its factorization.

401771408 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 810062 (or 810056 counting only the distinct ones).

The product of its (nonzero) digits is 6272, while the sum is 32.

The square root of 401771408 is about 20044.2362787910. The cubic root of 401771408 is about 737.8923519125.

The spelling of 401771408 in words is "four hundred one million, seven hundred seventy-one thousand, four hundred eight".