400420324 has 12 divisors (see below), whose sum is σ = 701234604. Its totient is φ = 200067584.

The previous prime is 400420291. The next prime is 400420331. The reversal of 400420324 is 423024004.

It can be written as a sum of positive squares in 2 ways, for example, as 242113600 + 158306724 = 15560^2 + 12582^2 .

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 29197 + ... + 40660.

It is an arithmetic number, because the mean of its divisors is an integer number (58436217).

Almost surely, 2^400420324 is an apocalyptic number.

It is an amenable number.

400420324 is a deficient number, since it is larger than the sum of its proper divisors (300814280).

400420324 is a wasteful number, since it uses less digits than its factorization.

400420324 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 71294 (or 71292 counting only the distinct ones).

The product of its (nonzero) digits is 768, while the sum is 19.

The square root of 400420324 is about 20010.5053409453. The cubic root of 400420324 is about 737.0642905253.

Adding to 400420324 its reverse (423024004), we get a palindrome (823444328).

The spelling of 400420324 in words is "four hundred million, four hundred twenty thousand, three hundred twenty-four".