406402242 has 32 divisors (see below), whose sum is σ = 826820352. Its totient is φ = 133144704.

The previous prime is 406402237. The next prime is 406402261. The reversal of 406402242 is 242204604.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 137383 + ... + 140309.

It is an arithmetic number, because the mean of its divisors is an integer number (25838136).

Almost surely, 2^406402242 is an apocalyptic number.

406402242 is an abundant number, since it is smaller than the sum of its proper divisors (420418110).

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

406402242 is a wasteful number, since it uses less digits than its factorization.

406402242 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3322.

The product of its (nonzero) digits is 3072, while the sum is 24.

The square root of 406402242 is about 20159.4206762000. The cubic root of 406402242 is about 740.7165217170.

Adding to 406402242 its reverse (242204604), we get a palindrome (648606846).

The spelling of 406402242 in words is "four hundred six million, four hundred two thousand, two hundred forty-two".