400442830 has 8 divisors (see below), whose sum is σ = 720797112. Its totient is φ = 160177128.

The previous prime is 400442821. The next prime is 400442831. The reversal of 400442830 is 38244004.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a junction number, because it is equal to n+sod(n) for n = 400442795 and 400442804.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (400442831) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 20022132 + ... + 20022151.

It is an arithmetic number, because the mean of its divisors is an integer number (90099639).

Almost surely, 2^400442830 is an apocalyptic number.

400442830 is a deficient number, since it is larger than the sum of its proper divisors (320354282).

400442830 is a wasteful number, since it uses less digits than its factorization.

400442830 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 40044290.

The product of its (nonzero) digits is 3072, while the sum is 25.

The square root of 400442830 is about 20011.0676876572. The cubic root of 400442830 is about 737.0780993966.

Adding to 400442830 its reverse (38244004), we get a palindrome (438686834).

The spelling of 400442830 in words is "four hundred million, four hundred forty-two thousand, eight hundred thirty".