402440552 has 8 divisors (see below), whose sum is σ = 754576050. Its totient is φ = 201220272.

The previous prime is 402440551. The next prime is 402440557. The reversal of 402440552 is 255044204.

It can be written as a sum of positive squares in only one way, i.e., 298114756 + 104325796 = 17266^2 + 10214^2 .

It is a tau number, because it is divible by the number of its divisors (8).

It is not an unprimeable number, because it can be changed into a prime (402440551) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 25152527 + ... + 25152542.

Almost surely, 2^402440552 is an apocalyptic number.

It is an amenable number.

402440552 is a deficient number, since it is larger than the sum of its proper divisors (352135498).

402440552 is a wasteful number, since it uses less digits than its factorization.

402440552 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 50305075 (or 50305071 counting only the distinct ones).

The product of its (nonzero) digits is 6400, while the sum is 26.

The square root of 402440552 is about 20060.9210157460. The cubic root of 402440552 is about 738.3017740939.

Adding to 402440552 its reverse (255044204), we get a palindrome (657484756).

The spelling of 402440552 in words is "four hundred two million, four hundred forty thousand, five hundred fifty-two".