405247855 has 8 divisors (see below), whose sum is σ = 491112864. Its totient is φ = 320988000.

The previous prime is 405247847. The next prime is 405247859. The reversal of 405247855 is 558742504.

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

It is not a de Polignac number, because 405247855 - 2³ = 405247847 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (405247859) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 400731 + ... + 401740.

It is an arithmetic number, because the mean of its divisors is an integer number (61389108).

Almost surely, 2^405247855 is an apocalyptic number.

405247855 is a deficient number, since it is larger than the sum of its proper divisors (85865009).

405247855 is a wasteful number, since it uses less digits than its factorization.

405247855 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 802577.

The product of its (nonzero) digits is 224000, while the sum is 40.

The square root of 405247855 is about 20130.7688626143. The cubic root of 405247855 is about 740.0145206549.

The spelling of 405247855 in words is "four hundred five million, two hundred forty-seven thousand, eight hundred fifty-five".