404445457 has 16 divisors (see below), whose sum is σ = 459612160. Its totient is φ = 352812672.

The previous prime is 404445439. The next prime is 404445463. The reversal of 404445457 is 754544404.

It is not a de Polignac number, because 404445457 - 2⁷ = 404445329 is a prime.

It is a super-2 number, since 2×404445457² = 327152255375877698, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (404445427) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 111088 + ... + 114670.

It is an arithmetic number, because the mean of its divisors is an integer number (28725760).

Almost surely, 2^404445457 is an apocalyptic number.

It is an amenable number.

404445457 is a deficient number, since it is larger than the sum of its proper divisors (55166703).

404445457 is a wasteful number, since it uses less digits than its factorization.

404445457 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4072.

The product of its (nonzero) digits is 179200, while the sum is 37.

The square root of 404445457 is about 20110.8293463994. The cubic root of 404445457 is about 739.5257839488.

The spelling of 404445457 in words is "four hundred four million, four hundred forty-five thousand, four hundred fifty-seven".