401507668 has 12 divisors (see below), whose sum is σ = 726867540. Its totient is φ = 193831232.

The previous prime is 401507663. The next prime is 401507669. The reversal of 401507668 is 866705104.

It can be written as a sum of positive squares in 2 ways, for example, as 222964624 + 178543044 = 14932^2 + 13362^2 .

It is a super-2 number, since 2×401507668² = 322416814925596448, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (401507663) 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, 1730521 + ... + 1730752.

It is an arithmetic number, because the mean of its divisors is an integer number (60572295).

Almost surely, 2^401507668 is an apocalyptic number.

It is an amenable number.

401507668 is a deficient number, since it is larger than the sum of its proper divisors (325359872).

401507668 is a wasteful number, since it uses less digits than its factorization.

401507668 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3461306 (or 3461304 counting only the distinct ones).

The product of its (nonzero) digits is 40320, while the sum is 37.

The square root of 401507668 is about 20037.6562501706. The cubic root of 401507668 is about 737.7308551639.

The spelling of 401507668 in words is "four hundred one million, five hundred seven thousand, six hundred sixty-eight".