402023244 has 36 divisors (see below), whose sum is σ = 1091207544. Its totient is φ = 114863616.

The previous prime is 402023239. The next prime is 402023257. The reversal of 402023244 is 442320204.

It is a Harshad number since it is a multiple of its sum of digits (21).

It is a self number, because there is not a number n which added to its sum of digits gives 402023244.

It is a congruent number.

It is an unprimeable number.

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 11 ways as a sum of consecutive naturals, for example, 341269 + ... + 342444.

Almost surely, 2^402023244 is an apocalyptic number.

It is an amenable number.

402023244 is an abundant number, since it is smaller than the sum of its proper divisors (689184300).

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

402023244 is a wasteful number, since it uses less digits than its factorization.

402023244 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 683734 (or 683725 counting only the distinct ones).

The product of its (nonzero) digits is 1536, while the sum is 21.

The square root of 402023244 is about 20050.5173000599. The cubic root of 402023244 is about 738.0464934979.

Adding to 402023244 its reverse (442320204), we get a palindrome (844343448).

The spelling of 402023244 in words is "four hundred two million, twenty-three thousand, two hundred forty-four".