405313444 has 6 divisors (see below), whose sum is σ = 709298534. Its totient is φ = 202656720.

The previous prime is 405313423. The next prime is 405313457. The reversal of 405313444 is 444313504.

It can be written as a sum of positive squares in only one way, i.e., 381420900 + 23892544 = 19530^2 + 4888^2 .

It is a super-2 number, since 2×405313444² = 328557975774282272, which contains 22 as substring.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 50664177 + ... + 50664184.

Almost surely, 2^405313444 is an apocalyptic number.

It is an amenable number.

405313444 is a deficient number, since it is larger than the sum of its proper divisors (303985090).

405313444 is a wasteful number, since it uses less digits than its factorization.

405313444 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 101328365 (or 101328363 counting only the distinct ones).

The product of its (nonzero) digits is 11520, while the sum is 28.

The square root of 405313444 is about 20132.3978700998. The cubic root of 405313444 is about 740.0544420623.

Adding to 405313444 its reverse (444313504), we get a palindrome (849626948).

The spelling of 405313444 in words is "four hundred five million, three hundred thirteen thousand, four hundred forty-four".