405494436 has 24 divisors (see below), whose sum is σ = 947832480. Its totient is φ = 134924992.

The previous prime is 405494431. The next prime is 405494437. The reversal of 405494436 is 634494504.

It is a junction number, because it is equal to n+sod(n) for n = 405494394 and 405494403.

It is not an unprimeable number, because it can be changed into a prime (405494431) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 22866 + ... + 36521.

It is an arithmetic number, because the mean of its divisors is an integer number (39493020).

Almost surely, 2^405494436 is an apocalyptic number.

It is an amenable number.

405494436 is an abundant number, since it is smaller than the sum of its proper divisors (542338044).

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

405494436 is a wasteful number, since it uses less digits than its factorization.

405494436 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 59963 (or 59961 counting only the distinct ones).

The product of its (nonzero) digits is 207360, while the sum is 39.

The square root of 405494436 is about 20136.8924116905. The cubic root of 405494436 is about 740.1645823360.

The spelling of 405494436 in words is "four hundred five million, four hundred ninety-four thousand, four hundred thirty-six".