402404022 has 12 divisors (see below), whose sum is σ = 871875420. Its totient is φ = 134134668.

The previous prime is 402404017. The next prime is 402404039. The reversal of 402404022 is 220404204.

It is a Harshad number since it is a multiple of its sum of digits (18), and also a Moran number because the ratio is a prime number: 22355779 = 402404022 / (4 + 0 + 2 + 4 + 0 + 4 + 0 + 2 + 2).

It is a junction number, because it is equal to n+sod(n) for n = 402403986 and 402404004.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 11177872 + ... + 11177907.

It is an arithmetic number, because the mean of its divisors is an integer number (72656285).

Almost surely, 2^402404022 is an apocalyptic number.

402404022 is an abundant number, since it is smaller than the sum of its proper divisors (469471398).

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

402404022 is a wasteful number, since it uses less digits than its factorization.

402404022 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 22355787 (or 22355784 counting only the distinct ones).

The product of its (nonzero) digits is 512, while the sum is 18.

The square root of 402404022 is about 20060.0105184419. The cubic root of 402404022 is about 738.2794345792.

Adding to 402404022 its reverse (220404204), we get a palindrome (622808226).

The spelling of 402404022 in words is "four hundred two million, four hundred four thousand, twenty-two".