402340242 has 16 divisors (see below), whose sum is σ = 839666880. Its totient is φ = 128282352.

The previous prime is 402340231. The next prime is 402340243. The reversal of 402340242 is 242043204.

It is not an unprimeable number, because it can be changed into a prime (402340243) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1457617 + ... + 1457892.

It is an arithmetic number, because the mean of its divisors is an integer number (52479180).

Almost surely, 2^402340242 is an apocalyptic number.

402340242 is an abundant number, since it is smaller than the sum of its proper divisors (437326638).

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

402340242 is a wasteful number, since it uses less digits than its factorization.

402340242 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2915537.

The product of its (nonzero) digits is 1536, while the sum is 21.

The square root of 402340242 is about 20058.4207254709. The cubic root of 402340242 is about 738.2404273893.

Adding to 402340242 its reverse (242043204), we get a palindrome (644383446).

The spelling of 402340242 in words is "four hundred two million, three hundred forty thousand, two hundred forty-two".