400240154 has 8 divisors (see below), whose sum is σ = 610202388. Its totient is φ = 196839360.

The previous prime is 400240133. The next prime is 400240189. The reversal of 400240154 is 451042004.

It can be written as a sum of positive squares in 2 ways, for example, as 387026929 + 13213225 = 19673^2 + 3635^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1640207 + ... + 1640450.

Almost surely, 2^400240154 is an apocalyptic number.

400240154 is a deficient number, since it is larger than the sum of its proper divisors (209962234).

400240154 is a wasteful number, since it uses less digits than its factorization.

400240154 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3280720.

The product of its (nonzero) digits is 640, while the sum is 20.

The square root of 400240154 is about 20006.0029491150. The cubic root of 400240154 is about 736.9537260446.

Adding to 400240154 its reverse (451042004), we get a palindrome (851282158).

The spelling of 400240154 in words is "four hundred million, two hundred forty thousand, one hundred fifty-four".