401291668 has 6 divisors (see below), whose sum is σ = 702260426. Its totient is φ = 200645832.

The previous prime is 401291663. The next prime is 401291669. The reversal of 401291668 is 866192104.

It is a happy number.

It can be written as a sum of positive squares in only one way, i.e., 282307204 + 118984464 = 16802^2 + 10908^2 .

It is a super-2 number, since 2×401291668² = 322070005612444448, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (401291663) 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, 50161455 + ... + 50161462.

Almost surely, 2^401291668 is an apocalyptic number.

It is an amenable number.

401291668 is a deficient number, since it is larger than the sum of its proper divisors (300968758).

401291668 is a wasteful number, since it uses less digits than its factorization.

401291668 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 100322921 (or 100322919 counting only the distinct ones).

The product of its (nonzero) digits is 20736, while the sum is 37.

The square root of 401291668 is about 20032.2656731584. The cubic root of 401291668 is about 737.5985385141.

The spelling of 401291668 in words is "four hundred one million, two hundred ninety-one thousand, six hundred sixty-eight".