404240142 has 16 divisors (see below), whose sum is σ = 809689680. Its totient is φ = 134545152.

The previous prime is 404240071. The next prime is 404240149. The reversal of 404240142 is 241042404.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (404240149) 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, 46017 + ... + 54092.

It is an arithmetic number, because the mean of its divisors is an integer number (50605605).

Almost surely, 2^404240142 is an apocalyptic number.

404240142 is an abundant number, since it is smaller than the sum of its proper divisors (405449538).

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

404240142 is a wasteful number, since it uses less digits than its factorization.

404240142 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 100787.

The product of its (nonzero) digits is 1024, while the sum is 21.

The square root of 404240142 is about 20105.7241103125. The cubic root of 404240142 is about 739.4006237376.

Adding to 404240142 its reverse (241042404), we get a palindrome (645282546).

The spelling of 404240142 in words is "four hundred four million, two hundred forty thousand, one hundred forty-two".