400042232 has 16 divisors (see below), whose sum is σ = 794201760. Its totient is φ = 188255104.

The previous prime is 400042231. The next prime is 400042241. The reversal of 400042232 is 232240004.

It is a Harshad number since it is a multiple of its sum of digits (17).

It is a self number, because there is not a number n which added to its sum of digits gives 400042232.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (400042231) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1470608 + ... + 1470879.

It is an arithmetic number, because the mean of its divisors is an integer number (49637610).

Almost surely, 2^400042232 is an apocalyptic number.

It is an amenable number.

400042232 is a deficient number, since it is larger than the sum of its proper divisors (394159528).

400042232 is a wasteful number, since it uses less digits than its factorization.

400042232 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2941510 (or 2941506 counting only the distinct ones).

The product of its (nonzero) digits is 384, while the sum is 17.

The square root of 400042232 is about 20001.0557721336. The cubic root of 400042232 is about 736.8322294853.

Adding to 400042232 its reverse (232240004), we get a palindrome (632282236).

The spelling of 400042232 in words is "four hundred million, forty-two thousand, two hundred thirty-two".