402530044 has 24 divisors (see below), whose sum is σ = 806371328. Its totient is φ = 172231920.

The previous prime is 402530003. The next prime is 402530047. The reversal of 402530044 is 440035204.

It is a happy number.

It is a junction number, because it is equal to n+sod(n) for n = 402529997 and 402530024.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (402530047) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 6277 + ... + 29059.

Almost surely, 2^402530044 is an apocalyptic number.

It is an amenable number.

402530044 is an abundant number, since it is smaller than the sum of its proper divisors (403841284).

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

402530044 is a wasteful number, since it uses less digits than its factorization.

402530044 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 23425 (or 23423 counting only the distinct ones).

The product of its (nonzero) digits is 1920, while the sum is 22.

The square root of 402530044 is about 20063.1513975248. The cubic root of 402530044 is about 738.3564962180.

Adding to 402530044 its reverse (440035204), we get a palindrome (842565248).

The spelling of 402530044 in words is "four hundred two million, five hundred thirty thousand, forty-four".