405197808 has 40 divisors (see below), whose sum is σ = 1092275328. Its totient is φ = 129193152.

The previous prime is 405197801. The next prime is 405197833. The reversal of 405197808 is 808791504.

It is a self number, because there is not a number n which added to its sum of digits gives 405197808.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (405197801) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 182410 + ... + 184617.

Almost surely, 2^405197808 is an apocalyptic number.

405197808 is a gapful number since it is divisible by the number (48) formed by its first and last digit.

It is an amenable number.

405197808 is an abundant number, since it is smaller than the sum of its proper divisors (687077520).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

405197808 is a wasteful number, since it uses less digits than its factorization.

405197808 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 367061 (or 367055 counting only the distinct ones).

The product of its (nonzero) digits is 80640, while the sum is 42.

The square root of 405197808 is about 20129.5257768284. The cubic root of 405197808 is about 739.9840561454.

The spelling of 405197808 in words is "four hundred five million, one hundred ninety-seven thousand, eight hundred eight".