402444024420 has 48 divisors (see below), whose sum is σ = 1126871399808. Its totient is φ = 107315727360.

The previous prime is 402444024413. The next prime is 402444024427. The reversal of 402444024420 is 24420444204.

It is an interprime number because it is at equal distance from previous prime (402444024413) and next prime (402444024427).

It is a super-2 number, since 2×402444024420² (a number of 24 digits) contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (30).

It is not an unprimeable number, because it can be changed into a prime (402444024427) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 3929665 + ... + 4030775.

It is an arithmetic number, because the mean of its divisors is an integer number (23476487496).

Almost surely, 2^402444024420 is an apocalyptic number.

It is an amenable number.

402444024420 is an abundant number, since it is smaller than the sum of its proper divisors (724427375388).

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

402444024420 is a wasteful number, since it uses less digits than its factorization.

402444024420 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 167460 (or 167458 counting only the distinct ones).

The product of its (nonzero) digits is 32768, while the sum is 30.

Adding to 402444024420 its reverse (24420444204), we get a palindrome (426864468624).

The spelling of 402444024420 in words is "four hundred two billion, four hundred forty-four million, twenty-four thousand, four hundred twenty".