405239364 has 36 divisors (see below), whose sum is σ = 1025025820. Its totient is φ = 134991360.

The previous prime is 405239363. The next prime is 405239381. The reversal of 405239364 is 463932504.

405239364 is a `hidden beast` number, since 40 + 523 + 93 + 6 + 4 = 666.

It can be written as a sum of positive squares in 2 ways, for example, as 344399364 + 60840000 = 18558^2 + 7800^2 .

It is a tau number, because it is divible by the number of its divisors (36).

It is a Smith number, since the sum of its digits (36) coincides with the sum of the digits of its prime factors.

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

It is not an unprimeable number, because it can be changed into a prime (405239363) 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 11 ways as a sum of consecutive naturals, for example, 75192 + ... + 80400.

Almost surely, 2^405239364 is an apocalyptic number.

It is an amenable number.

405239364 is an abundant number, since it is smaller than the sum of its proper divisors (619786456).

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

405239364 is a wasteful number, since it uses less digits than its factorization.

405239364 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7380 (or 7375 counting only the distinct ones).

The product of its (nonzero) digits is 77760, while the sum is 36.

The square root of 405239364 is about 20130.5579654415. The cubic root of 405239364 is about 740.0093522071.

The spelling of 405239364 in words is "four hundred five million, two hundred thirty-nine thousand, three hundred sixty-four".