408428817 has 16 divisors (see below), whose sum is σ = 549374400. Its totient is φ = 269892800.

The previous prime is 408428771. The next prime is 408428821. The reversal of 408428817 is 718824804.

It is a cyclic number.

It is not a de Polignac number, because 408428817 - 2⁶ = 408428753 is a prime.

It is not an unprimeable number, because it can be changed into a prime (408408817) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 420142 + ... + 421112.

It is an arithmetic number, because the mean of its divisors is an integer number (34335900).

Almost surely, 2^408428817 is an apocalyptic number.

It is an amenable number.

408428817 is a deficient number, since it is larger than the sum of its proper divisors (140945583).

408428817 is a wasteful number, since it uses less digits than its factorization.

408428817 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2064.

The product of its (nonzero) digits is 114688, while the sum is 42.

The square root of 408428817 is about 20209.6218915644. The cubic root of 408428817 is about 741.9457056389.

The spelling of 408428817 in words is "four hundred eight million, four hundred twenty-eight thousand, eight hundred seventeen".