401634405 has 24 divisors (see below), whose sum is σ = 712359648. Its totient is φ = 209222496.

The previous prime is 401634403. The next prime is 401634413. The reversal of 401634405 is 504436104.

It is not a de Polignac number, because 401634405 - 2¹ = 401634403 is a prime.

It is a super-2 number, since 2×401634405² = 322620390559408050, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (401634403) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 101847 + ... + 105716.

It is an arithmetic number, because the mean of its divisors is an integer number (29681652).

Almost surely, 2^401634405 is an apocalyptic number.

401634405 is a gapful number since it is divisible by the number (45) formed by its first and last digit.

It is an amenable number.

401634405 is a deficient number, since it is larger than the sum of its proper divisors (310725243).

401634405 is a wasteful number, since it uses less digits than its factorization.

401634405 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 207617 (or 207614 counting only the distinct ones).

The product of its (nonzero) digits is 5760, while the sum is 27.

The square root of 401634405 is about 20040.8184713100. The cubic root of 401634405 is about 737.8084692561.

The spelling of 401634405 in words is "four hundred one million, six hundred thirty-four thousand, four hundred five".