402400022 has 8 divisors (see below), whose sum is σ = 603750672. Its totient is φ = 201149800.

The previous prime is 402399997. The next prime is 402400039. The reversal of 402400022 is 220004204.

It is a happy number.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a super-3 number, since 3×402400022³ (a number of 27 digits) contains 333 as substring.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 14129 + ... + 31692.

It is an arithmetic number, because the mean of its divisors is an integer number (75468834).

Almost surely, 2^402400022 is an apocalyptic number.

402400022 is a deficient number, since it is larger than the sum of its proper divisors (201350650).

402400022 is a wasteful number, since it uses less digits than its factorization.

402400022 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 50214.

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

The square root of 402400022 is about 20059.9108173491. The cubic root of 402400022 is about 738.2769883416.

Adding to 402400022 its reverse (220004204), we get a palindrome (622404226).

The spelling of 402400022 in words is "four hundred two million, four hundred thousand, twenty-two".