240402042 has 12 divisors (see below), whose sum is σ = 520871130. Its totient is φ = 80134008.

The previous prime is 240402013. The next prime is 240402059. The reversal of 240402042 is 240204042.

It can be written as a sum of positive squares in only one way, i.e., 209699361 + 30702681 = 14481^2 + 5541^2 .

It is a Harshad number since it is a multiple of its sum of digits (18), and also a Moran number because the ratio is a prime number: 13355669 = 240402042 / (2 + 4 + 0 + 4 + 0 + 2 + 0 + 4 + 2).

It is an unprimeable number.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 6677817 + ... + 6677852.

Almost surely, 2^240402042 is an apocalyptic number.

240402042 is an abundant number, since it is smaller than the sum of its proper divisors (280469088).

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

240402042 is a wasteful number, since it uses less digits than its factorization.

240402042 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 13355677 (or 13355674 counting only the distinct ones).

The product of its (nonzero) digits is 512, while the sum is 18.

The square root of 240402042 is about 15504.9038049257. The cubic root of 240402042 is about 621.7933181506.

Adding to 240402042 its reverse (240204042), we get a palindrome (480606084).

The spelling of 240402042 in words is "two hundred forty million, four hundred two thousand, forty-two".