404145256 has 8 divisors (see below), whose sum is σ = 757772370. Its totient is φ = 202072624.

The previous prime is 404145251. The next prime is 404145283. The reversal of 404145256 is 652541404.

It is a happy number.

It can be written as a sum of positive squares in only one way, i.e., 277222500 + 126922756 = 16650^2 + 11266^2 .

It is a tau number, because it is divible by the number of its divisors (8).

It is a super-3 number, since 3×404145256³ (a number of 27 digits) contains 333 as substring.

It is not an unprimeable number, because it can be changed into a prime (404145251) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 25259071 + ... + 25259086.

Almost surely, 2^404145256 is an apocalyptic number.

It is an amenable number.

404145256 is a deficient number, since it is larger than the sum of its proper divisors (353627114).

404145256 is a wasteful number, since it uses less digits than its factorization.

404145256 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 50518163 (or 50518159 counting only the distinct ones).

The product of its (nonzero) digits is 19200, while the sum is 31.

The square root of 404145256 is about 20103.3642955601. The cubic root of 404145256 is about 739.3427668266.

It can be divided in two parts, 40 and 4145256, that added together give a square (4145296 = 2036²).

The spelling of 404145256 in words is "four hundred four million, one hundred forty-five thousand, two hundred fifty-six".