405879605 has 8 divisors (see below), whose sum is σ = 492528600. Its totient is φ = 321054976.

The previous prime is 405879589. The next prime is 405879611. The reversal of 405879605 is 506978504.

It can be written as a sum of positive squares in 4 ways, for example, as 107350321 + 298529284 = 10361^2 + 17278^2 .

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

It is a cyclic number.

It is not a de Polignac number, because 405879605 - 2⁴ = 405879589 is a prime.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 455600 + ... + 456489.

It is an arithmetic number, because the mean of its divisors is an integer number (61566075).

Almost surely, 2^405879605 is an apocalyptic number.

It is an amenable number.

405879605 is a deficient number, since it is larger than the sum of its proper divisors (86648995).

405879605 is an equidigital number, since it uses as much as digits as its factorization.

405879605 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 912183.

The product of its (nonzero) digits is 302400, while the sum is 44.

The square root of 405879605 is about 20146.4539063330. The cubic root of 405879605 is about 740.3988627669.

The spelling of 405879605 in words is "four hundred five million, eight hundred seventy-nine thousand, six hundred five".