408428775 has 36 divisors (see below), whose sum is σ = 735700680. Its totient is φ = 216590400.

The previous prime is 408428771. The next prime is 408428821. The reversal of 408428775 is 577824804.

It is not a de Polignac number, because 408428775 - 2² = 408428771 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (45).

It is a self number, because there is not a number n which added to its sum of digits gives 408428775.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (408428771) by changing a digit.

It is a polite number, since it can be written in 35 ways as a sum of consecutive naturals, for example, 35205 + ... + 45345.

It is an arithmetic number, because the mean of its divisors is an integer number (20436130).

Almost surely, 2^408428775 is an apocalyptic number.

408428775 is a gapful number since it is divisible by the number (45) formed by its first and last digit.

408428775 is a deficient number, since it is larger than the sum of its proper divisors (327271905).

408428775 is a wasteful number, since it uses less digits than its factorization.

408428775 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 10336 (or 10328 counting only the distinct ones).

The product of its (nonzero) digits is 501760, while the sum is 45.

The square root of 408428775 is about 20209.6208524554. The cubic root of 408428775 is about 741.9456802067.

The spelling of 408428775 in words is "four hundred eight million, four hundred twenty-eight thousand, seven hundred seventy-five".