400220524 has 24 divisors (see below), whose sum is σ = 764679888. Its totient is φ = 181770240.

The previous prime is 400220521. The next prime is 400220533. The reversal of 400220524 is 425022004.

It is not an unprimeable number, because it can be changed into a prime (400220521) by changing a digit.

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 7 ways as a sum of consecutive naturals, for example, 65404 + ... + 71260.

It is an arithmetic number, because the mean of its divisors is an integer number (31861662).

Almost surely, 2^400220524 is an apocalyptic number.

400220524 is a gapful number since it is divisible by the number (44) formed by its first and last digit.

It is an amenable number.

400220524 is a deficient number, since it is larger than the sum of its proper divisors (364459364).

400220524 is a wasteful number, since it uses less digits than its factorization.

400220524 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7425 (or 7423 counting only the distinct ones).

The product of its (nonzero) digits is 640, while the sum is 19.

The square root of 400220524 is about 20005.5123403526. The cubic root of 400220524 is about 736.9416777464.

Adding to 400220524 its reverse (425022004), we get a palindrome (825242528).

The spelling of 400220524 in words is "four hundred million, two hundred twenty thousand, five hundred twenty-four".