405601344 has 70 divisors (see below), whose sum is σ = 1202344814. Its totient is φ = 135198720.

The previous prime is 405601333. The next prime is 405601349. The reversal of 405601344 is 443106504.

It can be written as a sum of positive squares in only one way, i.e., 403527744 + 2073600 = 20088^2 + 1440^2 .

It is a hoax number, since the sum of its digits (27) coincides with the sum of the digits of its distinct prime factors.

It is a Harshad number since it is a multiple of its sum of digits (27).

It is not an unprimeable number, because it can be changed into a prime (405601349) by changing a digit.

It is a polite number, since it can be written in 9 ways as a sum of consecutive naturals, for example, 33937 + ... + 44304.

Almost surely, 2^405601344 is an apocalyptic number.

It is an amenable number.

405601344 is an abundant number, since it is smaller than the sum of its proper divisors (796743470).

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

405601344 is an equidigital number, since it uses as much as digits as its factorization.

405601344 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 78265 (or 78246 counting only the distinct ones).

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

The square root of 405601344 is about 20139.5467674921. The cubic root of 405601344 is about 740.2296243810.

Adding to 405601344 its reverse (443106504), we get a palindrome (848707848).

The spelling of 405601344 in words is "four hundred five million, six hundred one thousand, three hundred forty-four".