405040478 has 16 divisors (see below), whose sum is σ = 622359936. Its totient is φ = 197597400.

The previous prime is 405040463. The next prime is 405040507. The reversal of 405040478 is 874040504.

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, 103253 + ... + 107103.

It is an arithmetic number, because the mean of its divisors is an integer number (38897496).

Almost surely, 2^405040478 is an apocalyptic number.

405040478 is a deficient number, since it is larger than the sum of its proper divisors (217319458).

405040478 is a wasteful number, since it uses less digits than its factorization.

405040478 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5119.

The product of its (nonzero) digits is 17920, while the sum is 32.

The square root of 405040478 is about 20125.6174563664. The cubic root of 405040478 is about 739.8882702020. Note that the first 3 decimals are identical.

The spelling of 405040478 in words is "four hundred five million, forty thousand, four hundred seventy-eight".