404786340 has 144 divisors (see below), whose sum is σ = 1416175488. Its totient is φ = 91671552.

The previous prime is 404786339. The next prime is 404786351. The reversal of 404786340 is 43687404.

It is a Harshad number since it is a multiple of its sum of digits (36).

It is a junction number, because it is equal to n+sod(n) for n = 404786295 and 404786304.

It is an unprimeable number.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 140959 + ... + 143801.

It is an arithmetic number, because the mean of its divisors is an integer number (9834552).

Almost surely, 2^404786340 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 404786340, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (708087744).

404786340 is an abundant number, since it is smaller than the sum of its proper divisors (1011389148).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

404786340 is a wasteful number, since it uses less digits than its factorization.

404786340 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2978 (or 2973 counting only the distinct ones).

The product of its (nonzero) digits is 64512, while the sum is 36.

The square root of 404786340 is about 20119.3026718125. The cubic root of 404786340 is about 739.7334930249.

The spelling of 404786340 in words is "four hundred four million, seven hundred eighty-six thousand, three hundred forty".