3623405 has 8 divisors (see below), whose sum is σ = 4498200. Its totient is φ = 2798656.

The previous prime is 3623401. The next prime is 3623413. The reversal of 3623405 is 5043263.

3623405 = 1098² + 1099² + 1100².

It can be written as a sum of positive squares in 4 ways, for example, as 1485961 + 2137444 = 1219^2 + 1462^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 3623405 - 2² = 3623401 is a prime.

It is an Ulam number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (3623401) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 12350 + ... + 12639.

It is an arithmetic number, because the mean of its divisors is an integer number (562275).

Almost surely, 2^3623405 is an apocalyptic number.

It is an amenable number.

3623405 is a deficient number, since it is larger than the sum of its proper divisors (874795).

3623405 is a wasteful number, since it uses less digits than its factorization.

3623405 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 25023.

The product of its (nonzero) digits is 2160, while the sum is 23.

The square root of 3623405 is about 1903.5243628596. The cubic root of 3623405 is about 153.5933076556.

Adding to 3623405 its reverse (5043263), we get a palindrome (8666668).

The spelling of 3623405 in words is "three million, six hundred twenty-three thousand, four hundred five".