405232140 has 48 divisors (see below), whose sum is σ = 1165322592. Its totient is φ = 105140736.

The previous prime is 405232123. The next prime is 405232141. The reversal of 405232140 is 41232504.

It is not an unprimeable number, because it can be changed into a prime (405232141) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 89049 + ... + 93488.

It is an arithmetic number, because the mean of its divisors is an integer number (24277554).

Almost surely, 2^405232140 is an apocalyptic number.

It is an amenable number.

405232140 is an abundant number, since it is smaller than the sum of its proper divisors (760090452).

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

405232140 is a wasteful number, since it uses less digits than its factorization.

405232140 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 182586 (or 182584 counting only the distinct ones).

The product of its (nonzero) digits is 960, while the sum is 21.

The square root of 405232140 is about 20130.3785359342. The cubic root of 405232140 is about 740.0049549218.

Adding to 405232140 its reverse (41232504), we get a palindrome (446464644).

The spelling of 405232140 in words is "four hundred five million, two hundred thirty-two thousand, one hundred forty".