400730208 has 24 divisors (see below), whose sum is σ = 1051917048. Its totient is φ = 133576704.

The previous prime is 400730203. The next prime is 400730227. The reversal of 400730208 is 802037004.

It is a tau number, because it is divible by the number of its divisors (24).

It is a Harshad number since it is a multiple of its sum of digits (24).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (400730203) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 2087041 + ... + 2087232.

It is an arithmetic number, because the mean of its divisors is an integer number (43829877).

Almost surely, 2^400730208 is an apocalyptic number.

400730208 is a gapful number since it is divisible by the number (48) formed by its first and last digit.

It is an amenable number.

400730208 is an abundant number, since it is smaller than the sum of its proper divisors (651186840).

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

400730208 is a wasteful number, since it uses less digits than its factorization.

400730208 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4174286 (or 4174278 counting only the distinct ones).

The product of its (nonzero) digits is 1344, while the sum is 24.

The square root of 400730208 is about 20018.2468762876. The cubic root of 400730208 is about 737.2543787250.

The spelling of 400730208 in words is "four hundred million, seven hundred thirty thousand, two hundred eight".