402004022 has 16 divisors (see below), whose sum is σ = 694579200. Its totient is φ = 170930088.

The previous prime is 402004021. The next prime is 402004037. The reversal of 402004022 is 220400204.

It is a happy number.

It is a Harshad number since it is a multiple of its sum of digits (14).

It is a junction number, because it is equal to n+sod(n) for n = 402003988 and 402004006.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (402004021) 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, 111272 + ... + 114827.

It is an arithmetic number, because the mean of its divisors is an integer number (43411200).

Almost surely, 2^402004022 is an apocalyptic number.

402004022 is a deficient number, since it is larger than the sum of its proper divisors (292575178).

402004022 is a wasteful number, since it uses less digits than its factorization.

402004022 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 226235.

The product of its (nonzero) digits is 128, while the sum is 14.

The square root of 402004022 is about 20050.0379550763. The cubic root of 402004022 is about 738.0347305331.

Adding to 402004022 its reverse (220400204), we get a palindrome (622404226).

The spelling of 402004022 in words is "four hundred two million, four thousand, twenty-two".