404247645 has 32 divisors (see below), whose sum is σ = 730857600. Its totient is φ = 211940352.

The previous prime is 404247637. The next prime is 404247653. The reversal of 404247645 is 546742404.

404247645 is a `hidden beast` number, since 4 + 0 + 4 + 2 + 4 + 7 + 645 = 666.

It is an interprime number because it is at equal distance from previous prime (404247637) and next prime (404247653).

It is not a de Polignac number, because 404247645 - 2³ = 404247637 is a prime.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 17412 + ... + 33341.

It is an arithmetic number, because the mean of its divisors is an integer number (22839300).

Almost surely, 2^404247645 is an apocalyptic number.

404247645 is a gapful number since it is divisible by the number (45) formed by its first and last digit.

It is an amenable number.

404247645 is a deficient number, since it is larger than the sum of its proper divisors (326609955).

404247645 is a wasteful number, since it uses less digits than its factorization.

404247645 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 50826 (or 50820 counting only the distinct ones).

The product of its (nonzero) digits is 107520, while the sum is 36.

The square root of 404247645 is about 20105.9106981007. The cubic root of 404247645 is about 739.4051983192.

The spelling of 404247645 in words is "four hundred four million, two hundred forty-seven thousand, six hundred forty-five".