402304140 has 72 divisors (see below), whose sum is σ = 1394658720. Its totient is φ = 91954944.

The previous prime is 402304139. The next prime is 402304151. The reversal of 402304140 is 41403204.

It is a super-2 number, since 2×402304140² = 323697242122279200, which contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (18).

It is an unprimeable number.

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 23 ways as a sum of consecutive naturals, for example, 158385 + ... + 160904.

It is an arithmetic number, because the mean of its divisors is an integer number (19370260).

Almost surely, 2^402304140 is an apocalyptic number.

It is an amenable number.

402304140 is an abundant number, since it is smaller than the sum of its proper divisors (992354580).

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

402304140 is a wasteful number, since it uses less digits than its factorization.

402304140 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 319311 (or 319306 counting only the distinct ones).

The product of its (nonzero) digits is 384, while the sum is 18.

The square root of 402304140 is about 20057.5207839852. The cubic root of 402304140 is about 738.2183459515.

Adding to 402304140 its reverse (41403204), we get a palindrome (443707344).

The spelling of 402304140 in words is "four hundred two million, three hundred four thousand, one hundred forty".