402240022 has 8 divisors (see below), whose sum is σ = 603771336. Its totient is φ = 200982912.

The previous prime is 402240019. The next prime is 402240023. The reversal of 402240022 is 220042204.

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

It is a junction number, because it is equal to n+sod(n) for n = 402239978 and 402240005.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (402240023) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 64843 + ... + 70774.

It is an arithmetic number, because the mean of its divisors is an integer number (75471417).

Almost surely, 2^402240022 is an apocalyptic number.

402240022 is a deficient number, since it is larger than the sum of its proper divisors (201531314).

402240022 is a wasteful number, since it uses less digits than its factorization.

402240022 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 137102.

The product of its (nonzero) digits is 256, while the sum is 16.

The square root of 402240022 is about 20055.9223672211. The cubic root of 402240022 is about 738.1791255425.

Adding to 402240022 its reverse (220042204), we get a palindrome (622282226).

It can be divided in two parts, 4022 and 40022, that added together give a palindrome (44044).

The spelling of 402240022 in words is "four hundred two million, two hundred forty thousand, twenty-two".