405280379 has 8 divisors (see below), whose sum is σ = 464641248. Its totient is φ = 346285440.

The previous prime is 405280373. The next prime is 405280471. The reversal of 405280379 is 973082504.

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 405280379 - 2²⁰ = 404231803 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (405280373) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 89102 + ... + 93539.

It is an arithmetic number, because the mean of its divisors is an integer number (58080156).

Almost surely, 2^405280379 is an apocalyptic number.

405280379 is a deficient number, since it is larger than the sum of its proper divisors (59360869).

405280379 is a wasteful number, since it uses less digits than its factorization.

405280379 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 182965.

The product of its (nonzero) digits is 60480, while the sum is 38.

The square root of 405280379 is about 20131.5766645338. The cubic root of 405280379 is about 740.0343172544.

The spelling of 405280379 in words is "four hundred five million, two hundred eighty thousand, three hundred seventy-nine".