400302804 has 48 divisors (see below), whose sum is σ = 1025841600. Its totient is φ = 120483840.

The previous prime is 400302779. The next prime is 400302829. The reversal of 400302804 is 408203004.

It is a happy number.

It is an interprime number because it is at equal distance from previous prime (400302779) and next prime (400302829).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 9492 + ... + 29844.

It is an arithmetic number, because the mean of its divisors is an integer number (21371700).

Almost surely, 2^400302804 is an apocalyptic number.

400302804 is a gapful number since it is divisible by the number (44) 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 400302804, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (512920800).

400302804 is an abundant number, since it is smaller than the sum of its proper divisors (625538796).

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

400302804 is a wasteful number, since it uses less digits than its factorization.

400302804 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 20520 (or 20518 counting only the distinct ones).

The product of its (nonzero) digits is 768, while the sum is 21.

The square root of 400302804 is about 20007.5686678817. The cubic root of 400302804 is about 736.9921760782.

Adding to 400302804 its reverse (408203004), we get a palindrome (808505808).

The spelling of 400302804 in words is "four hundred million, three hundred two thousand, eight hundred four".