405720104 has 16 divisors (see below), whose sum is σ = 763993620. Its totient is φ = 201988480.

The previous prime is 405720103. The next prime is 405720137. The reversal of 405720104 is 401027504.

It can be written as a sum of positive squares in 2 ways, for example, as 394816900 + 10903204 = 19870^2 + 3302^2 .

It is a self number, because there is not a number n which added to its sum of digits gives 405720104.

It is not an unprimeable number, because it can be changed into a prime (405720101) 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, 106967 + ... + 110694.

Almost surely, 2^405720104 is an apocalyptic number.

It is an amenable number.

405720104 is a deficient number, since it is larger than the sum of its proper divisors (358273516).

405720104 is a wasteful number, since it uses less digits than its factorization.

405720104 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 217900 (or 217896 counting only the distinct ones).

The product of its (nonzero) digits is 1120, while the sum is 23.

The square root of 405720104 is about 20142.4949795203. The cubic root of 405720104 is about 740.3018636976.

Adding to 405720104 its reverse (401027504), we get a palindrome (806747608).

The spelling of 405720104 in words is "four hundred five million, seven hundred twenty thousand, one hundred four".