401776404 has 12 divisors (see below), whose sum is σ = 937478304. Its totient is φ = 133925464.

The previous prime is 401776387. The next prime is 401776409. The reversal of 401776404 is 404677104.

It is a tau number, because it is divible by the number of its divisors (12).

It is a super-2 number, since 2×401776404² = 322848557622342432, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (401776409) 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 in 3 ways as a sum of consecutive naturals, for example, 16740672 + ... + 16740695.

It is an arithmetic number, because the mean of its divisors is an integer number (78123192).

Almost surely, 2^401776404 is an apocalyptic number.

It is an amenable number.

401776404 is an abundant number, since it is smaller than the sum of its proper divisors (535701900).

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

401776404 is a wasteful number, since it uses less digits than its factorization.

401776404 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 33481374 (or 33481372 counting only the distinct ones).

The product of its (nonzero) digits is 18816, while the sum is 33.

The square root of 401776404 is about 20044.3609027577. The cubic root of 401776404 is about 737.8954104469.

The spelling of 401776404 in words is "four hundred one million, seven hundred seventy-six thousand, four hundred four".