402240471 has 4 divisors (see below), whose sum is σ = 536320632. Its totient is φ = 268160312.

The previous prime is 402240413. The next prime is 402240481. The reversal of 402240471 is 174042204.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 402240471 - 2⁷ = 402240343 is a prime.

It is a super-3 number, since 3×402240471³ (a number of 27 digits) contains 333 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (402240401) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 67040076 + ... + 67040081.

It is an arithmetic number, because the mean of its divisors is an integer number (134080158).

Almost surely, 2^402240471 is an apocalyptic number.

402240471 is a deficient number, since it is larger than the sum of its proper divisors (134080161).

402240471 is a wasteful number, since it uses less digits than its factorization.

402240471 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 134080160.

The product of its (nonzero) digits is 1792, while the sum is 24.

The square root of 402240471 is about 20055.9335609191. The cubic root of 402240471 is about 738.1794002063.

Adding to 402240471 its reverse (174042204), we get a palindrome (576282675).

The spelling of 402240471 in words is "four hundred two million, two hundred forty thousand, four hundred seventy-one".