404344545 has 16 divisors (see below), whose sum is σ = 705765312. Its totient is φ = 196045760.

The previous prime is 404344537. The next prime is 404344553. The reversal of 404344545 is 545443404.

It is a happy number.

It is an interprime number because it is at equal distance from previous prime (404344537) and next prime (404344553).

It is not a de Polignac number, because 404344545 - 2³ = 404344537 is a prime.

It is a super-2 number, since 2×404344545² = 326989022142514050, which contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (33).

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 1225122 + ... + 1225451.

It is an arithmetic number, because the mean of its divisors is an integer number (44110332).

Almost surely, 2^404344545 is an apocalyptic number.

It is an amenable number.

404344545 is a deficient number, since it is larger than the sum of its proper divisors (301420767).

404344545 is a wasteful number, since it uses less digits than its factorization.

404344545 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2450592.

The product of its (nonzero) digits is 76800, while the sum is 33.

The square root of 404344545 is about 20108.3202928539. The cubic root of 404344545 is about 739.4642731961.

Adding to 404344545 its reverse (545443404), we get a palindrome (949787949).

The spelling of 404344545 in words is "four hundred four million, three hundred forty-four thousand, five hundred forty-five".