400215342 has 16 divisors (see below), whose sum is σ = 800663040. Its totient is φ = 133366392.

The previous prime is 400215337. The next prime is 400215359. The reversal of 400215342 is 243512004.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 19459 + ... + 34337.

It is an arithmetic number, because the mean of its divisors is an integer number (50041440).

Almost surely, 2^400215342 is an apocalyptic number.

400215342 is an abundant number, since it is smaller than the sum of its proper divisors (400447698).

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

400215342 is a wasteful number, since it uses less digits than its factorization.

400215342 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 19367.

The product of its (nonzero) digits is 960, while the sum is 21.

The square root of 400215342 is about 20005.3828256297. The cubic root of 400215342 is about 736.9384971264.

Adding to 400215342 its reverse (243512004), we get a palindrome (643727346).

The spelling of 400215342 in words is "four hundred million, two hundred fifteen thousand, three hundred forty-two".