400238146 has 32 divisors (see below), whose sum is σ = 766765440. Its totient is φ = 152131200.

The previous prime is 400238119. The next prime is 400238149. The reversal of 400238146 is 641832004.

It is not an unprimeable number, because it can be changed into a prime (400238149) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 25381 + ... + 38008.

It is an arithmetic number, because the mean of its divisors is an integer number (23961420).

Almost surely, 2^400238146 is an apocalyptic number.

400238146 is a deficient number, since it is larger than the sum of its proper divisors (366527294).

400238146 is a wasteful number, since it uses less digits than its factorization.

400238146 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 63450.

The product of its (nonzero) digits is 4608, while the sum is 28.

The square root of 400238146 is about 20005.9527641150. The cubic root of 400238146 is about 736.9524936132.

The spelling of 400238146 in words is "four hundred million, two hundred thirty-eight thousand, one hundred forty-six".