401330637 has 12 divisors (see below), whose sum is σ = 586214460. Its totient is φ = 264547008.

The previous prime is 401330627. The next prime is 401330641. The reversal of 401330637 is 736033104.

It is a happy number.

It can be written as a sum of positive squares in 2 ways, for example, as 261760041 + 139570596 = 16179^2 + 11814^2 .

It is not a de Polignac number, because 401330637 - 2¹⁰ = 401329613 is a prime.

It is a super-2 number, since 2×401330637² = 322132560389651538, which contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 401330637.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (401330627) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 249718 + ... + 251319.

It is an arithmetic number, because the mean of its divisors is an integer number (48851205).

Almost surely, 2^401330637 is an apocalyptic number.

It is an amenable number.

401330637 is a deficient number, since it is larger than the sum of its proper divisors (184883823).

401330637 is a wasteful number, since it uses less digits than its factorization.

401330637 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 501132 (or 501129 counting only the distinct ones).

The product of its (nonzero) digits is 4536, while the sum is 27.

The square root of 401330637 is about 20033.2383053764. The cubic root of 401330637 is about 737.6224135401.

The spelling of 401330637 in words is "four hundred one million, three hundred thirty thousand, six hundred thirty-seven".