405442104 has 16 divisors (see below), whose sum is σ = 1013605320. Its totient is φ = 135147360.

The previous prime is 405442031. The next prime is 405442111. The reversal of 405442104 is 401244504.

It is a happy number.

It is a Harshad number since it is a multiple of its sum of digits (24), and also a Moran number because the ratio is a prime number: 16893421 = 405442104 / (4 + 0 + 5 + 4 + 4 + 2 + 1 + 0 + 4).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 8446687 + ... + 8446734.

Almost surely, 2^405442104 is an apocalyptic number.

It is an amenable number.

405442104 is an abundant number, since it is smaller than the sum of its proper divisors (608163216).

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

405442104 is a wasteful number, since it uses less digits than its factorization.

405442104 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 16893430 (or 16893426 counting only the distinct ones).

The product of its (nonzero) digits is 2560, while the sum is 24.

The square root of 405442104 is about 20135.5929637048. The cubic root of 405442104 is about 740.1327397624.

Adding to 405442104 its reverse (401244504), we get a palindrome (806686608).

The spelling of 405442104 in words is "four hundred five million, four hundred forty-two thousand, one hundred four".