404927685 has 72 divisors (see below), whose sum is σ = 740242152. Its totient is φ = 204672000.

The previous prime is 404927683. The next prime is 404927717. The reversal of 404927685 is 586729404.

It is a happy number.

It can be written as a sum of positive squares in 12 ways, for example, as 136819809 + 268107876 = 11697^2 + 16374^2 .

It is not a de Polignac number, because 404927685 - 2¹ = 404927683 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (45).

It is a self number, because there is not a number n which added to its sum of digits gives 404927685.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (404927683) by changing a digit.

It is a polite number, since it can be written in 71 ways as a sum of consecutive naturals, for example, 4009135 + ... + 4009235.

It is an arithmetic number, because the mean of its divisors is an integer number (10281141).

Almost surely, 2^404927685 is an apocalyptic number.

404927685 is a gapful number since it is divisible by the number (45) formed by its first and last digit.

It is an amenable number.

404927685 is a deficient number, since it is larger than the sum of its proper divisors (335314467).

404927685 is a wasteful number, since it uses less digits than its factorization.

404927685 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 247 (or 203 counting only the distinct ones).

The product of its (nonzero) digits is 483840, while the sum is 45.

The square root of 404927685 is about 20122.8150366692. The cubic root of 404927685 is about 739.8195840912.

The spelling of 404927685 in words is "four hundred four million, nine hundred twenty-seven thousand, six hundred eighty-five".