401400342324 has 18 divisors (see below), whose sum is σ = 1014650865410. Its totient is φ = 133800114096.

The previous prime is 401400342313. The next prime is 401400342353. The reversal of 401400342324 is 423243004104.

It is a happy number.

It can be written as a sum of positive squares in only one way, i.e., 340227224100 + 61173118224 = 583290^2 + 247332^2 .

It is a tau number, because it is divible by the number of its divisors (18).

It is a super-2 number, since 2×401400342324² (a number of 24 digits) contains 22 as substring.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 5575004719 + ... + 5575004790.

Almost surely, 2^401400342324 is an apocalyptic number.

It is an amenable number.

401400342324 is an abundant number, since it is smaller than the sum of its proper divisors (613250523086).

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

401400342324 is a wasteful number, since it uses less digits than its factorization.

401400342324 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 11150009519 (or 11150009514 counting only the distinct ones).

The product of its (nonzero) digits is 9216, while the sum is 27.

Adding to 401400342324 its reverse (423243004104), we get a palindrome (824643346428).

The spelling of 401400342324 in words is "four hundred one billion, four hundred million, three hundred forty-two thousand, three hundred twenty-four".