400303000 has 128 divisors (see below), whose sum is σ = 995904000. Its totient is φ = 150336000.

The previous prime is 400302997. The next prime is 400303003. The reversal of 400303000 is 303004.

It is an interprime number because it is at equal distance from previous prime (400302997) and next prime (400303003).

It is a Harshad number since it is a multiple of its sum of digits (10).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (400303003) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 1146826 + ... + 1147174.

It is an arithmetic number, because the mean of its divisors is an integer number (7780500).

Almost surely, 2^400303000 is an apocalyptic number.

400303000 is a gapful number since it is divisible by the number (40) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 400303000, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (497952000).

400303000 is an abundant number, since it is smaller than the sum of its proper divisors (595601000).

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

400303000 is a wasteful number, since it uses less digits than its factorization.

400303000 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 438 (or 424 counting only the distinct ones).

The product of its (nonzero) digits is 36, while the sum is 10.

The square root of 400303000 is about 20007.5735660274. The cubic root of 400303000 is about 736.9922963625.

Adding to 400303000 its reverse (303004), we get a palindrome (400606004).

The spelling of 400303000 in words is "four hundred million, three hundred three thousand".