405342632 has 8 divisors (see below), whose sum is σ = 760017450. Its totient is φ = 202671312.

The previous prime is 405342631. The next prime is 405342649. The reversal of 405342632 is 236243504.

It can be written as a sum of positive squares in only one way, i.e., 233050756 + 172291876 = 15266^2 + 13126^2 .

It is a tau number, because it is divible by the number of its divisors (8).

It is a junction number, because it is equal to n+sod(n) for n = 405342595 and 405342604.

It is not an unprimeable number, because it can be changed into a prime (405342631) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 25333907 + ... + 25333922.

Almost surely, 2^405342632 is an apocalyptic number.

It is an amenable number.

405342632 is a deficient number, since it is larger than the sum of its proper divisors (354674818).

405342632 is a wasteful number, since it uses less digits than its factorization.

405342632 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 50667835 (or 50667831 counting only the distinct ones).

The product of its (nonzero) digits is 17280, while the sum is 29.

The square root of 405342632 is about 20133.1227582807. The cubic root of 405342632 is about 740.0722062485.

The spelling of 405342632 in words is "four hundred five million, three hundred forty-two thousand, six hundred thirty-two".