402401244 has 48 divisors (see below), whose sum is σ = 1074221568. Its totient is φ = 114848448.

The previous prime is 402401231. The next prime is 402401257. The reversal of 402401244 is 442104204.

It is an interprime number because it is at equal distance from previous prime (402401231) and next prime (402401257).

It is a super-2 number, since 2×402401244² = 323853522345495072, which contains 22 as substring.

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 402401244.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 100774 + ... + 104690.

It is an arithmetic number, because the mean of its divisors is an integer number (22379616).

Almost surely, 2^402401244 is an apocalyptic number.

It is an amenable number.

402401244 is an abundant number, since it is smaller than the sum of its proper divisors (671820324).

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

402401244 is a wasteful number, since it uses less digits than its factorization.

402401244 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5154 (or 5152 counting only the distinct ones).

The product of its (nonzero) digits is 1024, while the sum is 21.

The square root of 402401244 is about 20059.9412760855. The cubic root of 402401244 is about 738.2777356689.

Adding to 402401244 its reverse (442104204), we get a palindrome (844505448).

The spelling of 402401244 in words is "four hundred two million, four hundred one thousand, two hundred forty-four".