404749945 has 16 divisors (see below), whose sum is σ = 494968320. Its totient is φ = 317649600.

The previous prime is 404749879. The next prime is 404749979. The reversal of 404749945 is 549947404.

It is not a de Polignac number, because 404749945 - 2²¹ = 402652793 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 404749895 and 404749904.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 129916 + ... + 132994.

It is an arithmetic number, because the mean of its divisors is an integer number (30935520).

Almost surely, 2^404749945 is an apocalyptic number.

It is an amenable number.

404749945 is a deficient number, since it is larger than the sum of its proper divisors (90218375).

404749945 is a wasteful number, since it uses less digits than its factorization.

404749945 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3576.

The product of its (nonzero) digits is 725760, while the sum is 46.

The square root of 404749945 is about 20118.3981718227. The cubic root of 404749945 is about 739.7113221455.

The spelling of 404749945 in words is "four hundred four million, seven hundred forty-nine thousand, nine hundred forty-five".