400446620 has 72 divisors (see below), whose sum is σ = 981635760. Its totient is φ = 136819200.

The previous prime is 400446617. The next prime is 400446643. The reversal of 400446620 is 26644004.

It is a self number, because there is not a number n which added to its sum of digits gives 400446620.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 392471 + ... + 393489.

It is an arithmetic number, because the mean of its divisors is an integer number (13633830).

Almost surely, 2^400446620 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 400446620, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (490817880).

400446620 is an abundant number, since it is smaller than the sum of its proper divisors (581189140).

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

400446620 is a wasteful number, since it uses less digits than its factorization.

400446620 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1443 (or 1434 counting only the distinct ones).

The product of its (nonzero) digits is 4608, while the sum is 26.

The square root of 400446620 is about 20011.1623850290. The cubic root of 400446620 is about 737.0804247533.

It can be divided in two parts, 40044 and 6620, that added together give a palindrome (46664).

The spelling of 400446620 in words is "four hundred million, four hundred forty-six thousand, six hundred twenty".