400442700 has 108 divisors (see below), whose sum is σ = 1347825192. Its totient is φ = 91526400.

The previous prime is 400442699. The next prime is 400442711. The reversal of 400442700 is 7244004.

It is a Harshad number since it is a multiple of its sum of digits (21).

It is an unprimeable number.

It is a polite number, since it can be written in 35 ways as a sum of consecutive naturals, for example, 1080 + ... + 28320.

Almost surely, 2^400442700 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 400442700, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (673912596).

400442700 is an abundant number, since it is smaller than the sum of its proper divisors (947382492).

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

400442700 is a wasteful number, since it uses less digits than its factorization.

400442700 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 27272 (or 27258 counting only the distinct ones).

The product of its (nonzero) digits is 896, while the sum is 21.

The square root of 400442700 is about 20011.0644394545. The cubic root of 400442700 is about 737.0780196348.

Adding to 400442700 its reverse (7244004), we get a palindrome (407686704).

The spelling of 400442700 in words is "four hundred million, four hundred forty-two thousand, seven hundred".