401520544 has 96 divisors (see below), whose sum is σ = 856351440. Its totient is φ = 184934400.

The previous prime is 401520523. The next prime is 401520557. The reversal of 401520544 is 445025104.

It is a happy number.

It can be written as a sum of positive squares in 8 ways, for example, as 77088400 + 324432144 = 8780^2 + 18012^2 .

It is a super-2 number, since 2×401520544² = 322437494508111872, which contains 22 as substring.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 2320842 + ... + 2321014.

Almost surely, 2^401520544 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 401520544, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (428175720).

401520544 is an abundant number, since it is smaller than the sum of its proper divisors (454830896).

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

401520544 is a wasteful number, since it uses less digits than its factorization.

401520544 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 314 (or 306 counting only the distinct ones).

The product of its (nonzero) digits is 3200, while the sum is 25.

The square root of 401520544 is about 20037.9775426563. The cubic root of 401520544 is about 737.7387412075.

Adding to 401520544 its reverse (445025104), we get a palindrome (846545648).

The spelling of 401520544 in words is "four hundred one million, five hundred twenty thousand, five hundred forty-four".