401543634 has 16 divisors (see below), whose sum is σ = 803467872. Its totient is φ = 133784448.

The previous prime is 401543633. The next prime is 401543669. The reversal of 401543634 is 436345104.

It is a super-2 number, since 2×401543634² = 322474580011851912, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (401543633) 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 in 7 ways as a sum of consecutive naturals, for example, 1084 + ... + 28359.

It is an arithmetic number, because the mean of its divisors is an integer number (50216742).

Almost surely, 2^401543634 is an apocalyptic number.

401543634 is an abundant number, since it is smaller than the sum of its proper divisors (401924238).

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

401543634 is a wasteful number, since it uses less digits than its factorization.

401543634 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 31721.

The product of its (nonzero) digits is 17280, while the sum is 30.

The square root of 401543634 is about 20038.5536903241. The cubic root of 401543634 is about 737.7528825022.

Adding to 401543634 its reverse (436345104), we get a palindrome (837888738).

The spelling of 401543634 in words is "four hundred one million, five hundred forty-three thousand, six hundred thirty-four".