405427642 has 8 divisors (see below), whose sum is σ = 608246100. Its totient is φ = 202678944.

The previous prime is 405427621. The next prime is 405427691. The reversal of 405427642 is 246724504.

It can be written as a sum of positive squares in 2 ways, for example, as 405176641 + 251001 = 20129^2 + 501^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is a junction number, because it is equal to n+sod(n) for n = 405427598 and 405427607.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 984 + ... + 28492.

Almost surely, 2^405427642 is an apocalyptic number.

405427642 is a deficient number, since it is larger than the sum of its proper divisors (202818458).

405427642 is a wasteful number, since it uses less digits than its factorization.

405427642 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 34880.

The product of its (nonzero) digits is 53760, while the sum is 34.

The square root of 405427642 is about 20135.2338451780. The cubic root of 405427642 is about 740.1239395524.

It can be divided in two parts, 40542 and 7642, that added together give a palindrome (48184).

The spelling of 405427642 in words is "four hundred five million, four hundred twenty-seven thousand, six hundred forty-two".