405401144 has 16 divisors (see below), whose sum is σ = 763159320. Its totient is φ = 201892000.

The previous prime is 405401131. The next prime is 405401147. The reversal of 405401144 is 441104504.

It is a happy number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (405401147) 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, 98939 + ... + 102954.

Almost surely, 2^405401144 is an apocalyptic number.

It is an amenable number.

405401144 is a deficient number, since it is larger than the sum of its proper divisors (357758176).

405401144 is a wasteful number, since it uses less digits than its factorization.

405401144 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 202150 (or 202146 counting only the distinct ones).

The product of its (nonzero) digits is 1280, while the sum is 23.

The square root of 405401144 is about 20134.5758336251. The cubic root of 405401144 is about 740.1078148243.

Adding to 405401144 its reverse (441104504), we get a palindrome (846505648).

The spelling of 405401144 in words is "four hundred five million, four hundred one thousand, one hundred forty-four".