400211264 has 14 divisors (see below), whose sum is σ = 794169354. Its totient is φ = 200105600.

The previous prime is 400211261. The next prime is 400211299. The reversal of 400211264 is 462112004.

It can be written as a sum of positive squares in only one way, i.e., 329785600 + 70425664 = 18160^2 + 8392^2 .

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (400211261) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 3126587 + ... + 3126714.

Almost surely, 2^400211264 is an apocalyptic number.

It is an amenable number.

400211264 is a deficient number, since it is larger than the sum of its proper divisors (393958090).

400211264 is an equidigital number, since it uses as much as digits as its factorization.

400211264 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6253313 (or 6253303 counting only the distinct ones).

The product of its (nonzero) digits is 384, while the sum is 20.

The square root of 400211264 is about 20005.2809028016. The cubic root of 400211264 is about 736.9359941027.

Adding to 400211264 its reverse (462112004), we get a palindrome (862323268).

The spelling of 400211264 in words is "four hundred million, two hundred eleven thousand, two hundred sixty-four".