405040378 has 8 divisors (see below), whose sum is σ = 613824372. Its totient is φ = 200432256.

The previous prime is 405040331. The next prime is 405040381. The reversal of 405040378 is 873040504.

It can be written as a sum of positive squares in 2 ways, for example, as 386004609 + 19035769 = 19647^2 + 4363^2 .

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

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, 1043725 + ... + 1044112.

Almost surely, 2^405040378 is an apocalyptic number.

405040378 is a deficient number, since it is larger than the sum of its proper divisors (208783994).

405040378 is a wasteful number, since it uses less digits than its factorization.

405040378 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2087936.

The product of its (nonzero) digits is 13440, while the sum is 31.

The square root of 405040378 is about 20125.6149719704. The cubic root of 405040378 is about 739.8882093120. Note that the first 3 decimals are identical.

The spelling of 405040378 in words is "four hundred five million, forty thousand, three hundred seventy-eight".